If cellular respiration and photosynthesis are essentially reverse reactions, why do we do them?
O Ultimately the two process allow sunlight to be converted to usable ATP
O Ultimately the two process allow ATP to be converted to usable glucose
O This is the only way to turn carbon dioxide into oxygen
O Our cells become bored and find these proccesses fun

Answers

Answer 1

Respiration and Photosynthesis are almostopposite processes because photosynthesis removes carbon dioxide from the atmosphere while respiration puts back carbon dioxide.

Who discovered photosynthesis?

Jan Ingenhousz, (born December 8, 1730, Breda, Netherlands—died September 7, 1799, Bowood, Wiltshire, England), Dutch-born British physician and scientist who is best known for his discovery of the process of photosynthesis, by which green plants in sunlight absorb carbon dioxide and release oxygen.

How does photosynthesis affect plants?

During photosynthesis, carbon dioxide, a gas, is combined with water and solar energy, and converted to carbohydrates, a solid. Formation of carbohydrates is a chemical way to store the sun's energy as “food.” Carbohydrates produced from photosynthesis provide energy for all plant growth and maintenance.

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Related Questions

For each type of organism, place a check mark in the box to indicate whether the cellular characteristic or function is present. CHARACTERISTIC OR FUNCTION PROTOZOA ALGAE CYANOBACTERIA
Nucleus Flagella Pseudopodia Cilia Photosynthetic pigment(s) Chloroplasts Cell wall

Answers

For each type of organism, the indicate whether a cellular characteristic or function is present.

Characteristics of Protozoa Algae Cyanobacteria

Nucleus ✓ ✓ -

Flagella ✓ - -

Pseudopodia ✓ - -

Cilia ✓ - -

Pigment - ✓ ✓

photosynthesis ✓ ✓ ✓

Chloroplasts ✓ ✓ ✓

Cell wall ✓ ✓ ✓

Protozoa are single-celled animals with eukaryotic cell types that live alone or in colonies. Organisms that are used as the main tool for movement are flagella, cilia, pseudopodia. Several types of protozoa have cell walls and can form their own food through photosynthesis.

Algae are thallus plants because they do not have true roots, stems and leaves that can make their own food by photosynthesis. Algae are a type of eukaryotic cell that has a cell wall, chloroplast, and nucleus. In the algae body itself there are dyes (pigments) namely blue, green, yellow, and brown.

Cyanobacteria or blue-green algae are a group of eubacteria with prokaryotic cells and generally live in waters. Cynobacteria contain a type of chlorophyll, and various carotenoids as well as phycocyanin and phycoerythrin which give these organisms their characteristic color. These organisms have a cell wall containing a thin peptidoglycan layer and act as plant pioneers.

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classify each property as associated with a liquid that has strong or weak intermolecular forces. drag the appropriate items to their respective bins.

Answers

Because it takes more energy that break the bonds between atoms, as the intermolecular forces grow, so does the melting point of molecule.

How do liquid characteristics differ depending on intermolecular forces?

Bulk properties, like the boiling and melting temperatures of liquids, are determined by intermolecular forces. When molecules in a liquid have enough heating energy to escape the intermolecular interactions holding them together, the result is the formation of vapor bubbles.

What has an intermolecular force that is weak?

These London dispersion forces are the least powerful intermolecular forces. Dispersion force in London: Dipole - dipole forces are also referred to as induced-dipole-induced-dipole because they are transiently attractive forces that cause temporary dipoles to form. The non-polar, monoatomic gas exhibits London dispersion.

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based on mendel's law of independent assortment, an organism with the genotype aabb should form gametes with which of the following ratios?

Answers

Based on Mendel's law of independent assortment, organism with the genotype AaBb should form gametes with : AB : 1 Ab : 1 aB : 1 ab.

What is meant by genotype?

Genotype of an organism is its complete set of genetic material and can also be used to refer to the alleles an individual carries in a particular gene/ genetic location.

Types of genotypes are as : homozygous recessive, homozygous dominant and heterozygous. Homozygous dominant and heterozygous genotypes show same phenotypes.

A genotype is the unique sequence of DNA and is used to refer to the two alleles a person has inherited for particular gene.

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Note: The question given on the portal is incomplete. Here os the complete question.

Question: Based on Mendel's law of independent assortment, an organism with the genotype AaBb should form gametes with which of the following ratios?

9 AB : 3 Ab : 3 aB : 1 ab

1 AABB : 1: AABb : 1 AaBB : 1 aabb

1 AB : 1 Ab : 1 aB : 1 ab

1 AA : 1 aa : 1 BB : 1 bb

9 AABB : 3 AABb : 3 AaBB : 1 aabb

what are some mistakes students might make during experiments like we do in the lab

Answers

Most researchers make the very common error of not completely dissolving the drug reagents,  precipitate out of the buffer. As a result, drug concentration won't be as needed, leading to experiment mistake.

What are typical issues with experiments?

Despite the widespread use of experimentation, studies are plagued by serious methodological issues, including the following: (1) a lack of underlying theory; (2) an overabundance of measuring devices; (3) unsuitable research designs; (4) a variety of experimental tasks; and (5) a lack of internal validity.

What laboratory error occurs the most frequently?

The most frequent lab mistakes in sample collection and reporting are: The sample was incorrectly labeled. The way the blood sample was taken: It's crucial to use a solid technique to draw blood that is of high quality.

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Which of the following builds new strands of DNA?
A. DNA polymerase
B. the replication fork
C. DNA helicase
D. the lagging strand of DNA
E. the leading strand of DNA

Answers

DNA polymerases, which require a template and a primer (beginning) and synthesis DNA in the 5' to 3' orientation, are the enzymes responsible for creating new DNA. One new strand (the leading strand) is created during DNA replication in one continuous piece.

How does the DNA polymerase create a new strand in one direction?

The other new strand is assembled into brief units known as Okazaki fragments because DNA polymerase can only create DNA in a 5′ to 3′ manner. Small fragments make up the other (lagging strand).

After replication, what is the new strand of DNA known as?

The new DNA strand that is being produced in the same direction as the expanding replication fork is known as the leading strand.

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I have a question about temperature please!

Answers

62 [tex]^oF[/tex] would be 16.67  [tex]^oC[/tex].

Conversion from  [tex]^oF[/tex] to [tex]^oC[/tex]

The general formula for converting from  [tex]^oF[/tex] to [tex]^oC[/tex] is as follows:

[tex]^oC[/tex] = (°F − 32) × 5/9

In this case, the °F to be converted is 62. Let's substitute this value into the formula:

62 [tex]^oF[/tex] = (62 -32) x 5/9

          = 16.67  [tex]^oC[/tex]

In other words, 62 [tex]^oF[/tex] is equivalent to 16.67  [tex]^oC[/tex].

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An action scene demonstrating part of a crime is called

a map
a video recording
a reenactment
a reconstruction

Answers

The correct answer to the student question is that an action scene demonstrating part of a crime is called a reenactment.

When answering questions on the Brainly platform, it is important to always be factually accurate, professional, and friendly. It is also important to be concise and avoid providing extraneous amounts of detail. Additionally, it is best to ignore any typos or irrelevant parts of the question.

The action scene demonstrating part of a crime is called a reenactment. A reenactment is a dramatic or visual portrayal of an event or series of events. In the context of criminal investigations,

a reenactment may involve recreating a crime scene or a specific aspect of a crime, such as an action scene, to help investigators understand how the crime was committed and identify potential suspects.

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Summarize the flow of the blood and include the valves, chambers, and major arteries and veins involved. Start with the three structures that empty the blood into the right atrium. Finish the flow with the aorta.

Answers

Explanation:

The flow of the blood starts with the three structures that empty the blood into the right atrium - the superior vena cava, the inferior vena cava, and the coronary sinus. The right atrium then pumps the blood through the tricuspid valve into the right ventricle. From the right ventricle, the blood is pumped through the pulmonary valve into the pulmonary artery and then to the lungs to be oxygenated. The oxygenated blood then returns to the left atrium through the pulmonary veins. The left atrium then pumps the blood through the mitral valve into the left ventricle. From the left ventricle, the blood is pumped through the aortic valve into the aorta. The aorta then branches off into various arteries and veins, which deliver the oxygenated blood throughout the body.

Deoxygenated blood flows from the superior vena cava, inferior vena cava and coronary sinus into the right atrium. From the right atrium it enters the right ventricle through the tricuspid valve.

From the right ventricle, the blood is pumped into the pulmonary trunk from where it is transported to the right and left pulmonary arteries and into the lungs for oxygenation.

From the pulmonary veins, oxygenated blood is carried to the left atrium, and passes to the left ventricle through the bicuspid valve. It is then pumped from the left ventricle into the aorta, from which it flows to the systemic arteries.

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The examples below provide recombination frequency from two-factor crosses. Answer the following:
a. For genes ABC, what is the gene order if AB = 30%, AC = 20%, and BC = 38%?

Answers

The gene order for the genes ABC is A-C-B, as AB - AC = BC.

Let's assume that the genes A, B, and C are all located on the same chromosome (i.e., they are linked). These genes may be located on a chromosome in one of three distinct linear orders. A-B-C, A-C-B, or B-A-C are these. Therefore, the gene present in the middle should be identified for determining the linear order.

The gene order may be established using the mathematical relationship between the recombination values of three genes. The order of genes can be determined from the example's values for X, Y, and Z:

if Z = X – Y, the order of genes is A-C-B. Here, BC = AB - AC:

10 = 30 - 20.

The briefest distance between two genes A and B is 30 cM, between A and C is 20 cM, that between B and C is 38 cM. Briefing this suggests that the gene A and C are held next to each other, while B is held next to C. Thus, the correct gene order for the genes A, B, and C is A-C-B. The verification includes AB - AC = BC.

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Correct question is:

The examples below provide recombination frequency from two-factor crosses. Answer the following:

a. For genes ABC, what is the gene order if AB = 30%, AC = 20%, and BC = 10%?

what amino acid sequnece will be generated based on the following mrna codon sequence? 5'aug ucu ucg uua ucc uug 3

Answers

The following mRNA codon sequence will produce the amino acid sequence met-ser-ser-leu-ser-leu.

What is the amino acid mRNA codon?

Since codons are three-letter structures, the four nucleotides that make up mRNA — A, U, G, and C — can be put together in a total of 64 different ways. Three stop signal codons connect the 61 amino acid codons that make up these 64 codons to indicate the completion of protein synthesis.

How is an mRNA codon translated?

The order of amino acids in a protein, from the N-terminus (methionine) to the C-terminus, is determined by mRNA codons, which are read from 5' to 3'. Each group of three mRNA nucleotides read during translation determines an amino acid.

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Could the person labeled D have a recessive allele? Explain.

Answers

Because both parents have a dominant allele for the characteristic, the individual designated D will have a recessive allele.

A variant version of a gene is what this is. There are two possibilities in this scenario: dominant and recessive alleles. For all kids to have the dominant characteristic, both parents must carry the dominant allele.

Is it possible that the person designated D has a recessive allele?

Indeed, he could because each of his parents has a different allele. His father carries the dominant gene, whereas his mother carries the recessive allele. Because both parents have a dominant allele for the characteristic, the individual designated D will have a recessive allele. A variant version of a gene is what this is. In this situation,

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which of the following molecules might change over time in a cancer cell? which of the following molecules might change over time in a cancer cell? a. membrane glycolipids b. membrane glycoproteins c. glycocalyx sugars d. all of the above

Answers

All of the above, a, b, and c, might change over time in a cancer cell.

Cancer cells often undergo changes in their cell membranes, leading to alterations in the composition and expression of membrane glycolipids, glycoproteins, and glycocalyx sugars. These changes can result in the modulation of cell-cell and cell-matrix interactions, influencing cell signaling pathways and enabling the cancer cells to evade the host immune system, among other functions.

For example, changes in membrane glycolipids and glycoproteins can alter cell-surface antigen expression and immune recognition, allowing cancer cells to evade the host immune system. Altered glycocalyx sugars can also contribute to changes in cell adhesion, migration, and invasion.

In summary, changes in membrane glycolipids, glycoproteins, and glycocalyx sugars are common in cancer cells and can play a role in the development and progression of the disease.

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"Frankenstein" was written during a competition because…

Answers

Answer:

Mary Shelley and her friends had a ghost story writing contest while they were staying together on a rainy summer's night in Switzerland. Shelley's novel "Frankenstein" was the result of this competition.

T/F: the differences between multicellular organisms are largely explained by the different kinds of genes carried on their chromosomes and when and where the genes are expressed.

Answers

The statement "the differences between multicellular organisms are largely explained by the different kinds of genes carried on their chromosomes and when and where the genes are expressed" is true because there are hundreds to thousands of genes on each chromosome.

The most significant class of substance in the body is likely proteins. Proteins serve as more than only the building blocks for skin, connective tissue, muscles, and other organs of organisms. The production of enzymes also requires them. Nearly all chemical reactions and functions in the body are controlled and carried out by sophisticated proteins called enzymes. There are thousands of distinct enzymes that the body makes.

As a result, the kinds and quantities of proteins the body synthesizes control the overall structure and operation of the body. Genes, which are found on chromosomes, regulate the production of proteins.

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Upon reception of a biochemical signal by a eukaryotic cell, which of the following would change first when the genetic expression pattern of the cell changes? Choose one: A. The proteome would change first. B. The transcriptome would change first. C. The proteome and transcriptome would change simultaneously. D. The proteome and transcriptome would not change; they are not parts of genetic expression.

Answers

B) A eukaryotic cell would first experience changes in the transcriptome and subsequently the proteome in response to a biochemical stimulus.

What distinguishes methanogens from other organisms?

Three characteristics are present in all methanogens. (1) They must manufacture methane since it provides them with all or the majority of the energy they need to grow. (2) They are archaea, a subclass of Euryarchaeota. (3) As strict anaerobes, they can only develop under anaerobic conditions.

How does pyruvate become ethanol?

fermentation. Pyruvate molecules are used in the fermentation process (more particularly, the alcoholic fermentation) to create ethanol. Alcohol dehydrogenase and pyruvate decarboxylase are the extra enzymes at play. Pyruvate will be converted by the two enzymes to acetaldehyde, which will subsequently be converted to ethanol.

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Consider your typical daily food choices. Is sugar intake something you focus
on? Do you keep track of your intake of added sugars? Do you check food
labels for added sugars? What are some choices/changes you have made, or
can make to lower your intake of added sugars?


Let me know you opinion Please

Answers

Do you monitor your consumption of added sugars What decisions or modifications have you made We would have consumed 7.9 tablespoons of sucrose if sucrose had made up the entirety of our additional sugar .

How are teaspoons of sugar calculated?

A significant amount of added sugar may be concealed in drinks. Because of this, it's crucial to consistently inspect the bottle's back. We must first read the list if ingredients and the Nutrition Facts label to see just how much sugar is in our beverage before we can compute teaspoons of fructose (table sugar).

What risks does sucrose pose?

When sucrose is metabolized, sugar splits into glucose and fructose, which your body uses in different ways. Your blood sugar is raised during this process, and too much of it can cause blood vessels to burst and oral health issues including gum diseases and cavities.

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TRUE/FALSE. elongation of the polypeptide chain is terminated when a stop codon is incorporated into the newly synthesized protein.

Answers

The given statement is True.

Translation is the process by which ribosomes read the information encoded in messenger RNA (mRNA) and synthesize a corresponding protein. The ribosome reads the mRNA codons three nucleotides at a time and matches each codon to a specific amino acid. When the ribosome reaches a stop codon, which does not code for an amino acid, it signals the termination of protein synthesis. This stop codon acts as a signal for the release of the newly synthesized protein from the ribosome. In conclusion, elongation of the polypeptide chain is terminated when a stop codon is incorporated into the newly synthesized protein. The stop codon acts as a signal for the release of the newly synthesized protein from the ribosome, and is a critical step in ensuring the accuracy and efficiency of protein synthesis.

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given that caffeine is a stimulant, which of the following mechanisms best explains the reason for the feeling that the heart skipped a beat?

Answers

The reason for a feeling that the heart skipped a beat is : C) Purkinje fibers initiate spontaneous action potentials which causes ventricles to contract early.

What is the reason for the feeling that heart skipped a beat?

When you feel "skipped" beat, then you are probably experiencing an early heartbeat. Because the heart contracts before ventricles have had time to fill with blood and there is little or no blood pushed out to the body. Therefore, we don't feel that contraction as a beat.

Some are more sensitive to caffeine than others, and for some, caffeine may trigger heart palpitations. Caffeine may cause heart palpitations in people with caffeine sensitivity and those with underlying heart condition.

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Question: A person notices his or her heart beat because he or she senses blood being pumped by the heart. Excessive caffeine intake can lead to irregular heart rhythms (arrhythmias) that patients perceive as "skipped beats." Given that caffeine is a stimulant, which of the following mechanisms best explains the reason for the feeling that the heart skipped a beat?

A) Action potentials are not delayed sufficiently at the AV node.

B) Action potentials propagate into the ventricles before the contractile cells have repolarized from the previous heartbeat.

C) Purkinje fibers initiate spontaneous action potentials which cause the ventricles to contract early.

D) Spontaneous action potentials in the SA node overlap such that the repolarizing phase of one action potential cancels out the depolarizing phase of the next.

The frequency of q (the recessive allele) of a trait is 0.3, what is the frequency of p (the dominant allele)? Equation: p+q=1

Question 18 options:

0.6


0.7


0.3


1

Answers

Answer:

Equation: p+q=1 Answer is 0.7

The ____ is when genes establish boundaries for environmental influences rather that specifically denoting a particular characteristic.

Answers

The Nature vs. Nurture debate is when genes establish boundaries for environmental influences rather that specifically denoting a particular characteristic.

What is gene?

The genotype of an organism is its whole collection of genetic material. The term "genotype" can also refer to an individual's alleles or variants in a certain gene or genetic area. The term "genotype" refers to an organism's genetic composition in general; in other words, it characterizes an organism's whole collection of genes. The three forms of genotypes are homozygous recessive (pp), homozygous dominant (PP), and heterozygous (Pp). Homozygous dominant and heterozygous genotypes have identical characteristics.

Here,

The Nature versus. Nurture dispute occurs when genes provide limits for environmental impacts rather than indicating a specific trait.

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~~20. A base deletion of base eight (frameshift mutation) occurs in the following
nucleotide sequence: CTCACGATTGAGTAG. (4 points)
1. Write the codons (base triplets) for the original nucleotide
sequence. I
2. Write the codons (base triplets) for the nucleotide sequence
following the base deletion.

Answers

A base triplet is formed by the combination of 3 consecutive base

1. The codons (base triplets) for the original nucleotide sequence are-

CTC ACG ATT GAG TAG

2. A base deletion of base eight will result in frameshift mutation. The next nucleotide (base nine) will take the position of eight base and similarly other base will take the position of previous base resulting in formation of new nucleotide sequence.

CTC ACG ATG AGT AG

The last two base will not form a triplet and so will not code for any amino acid.

What is frameshift mutation?

A frameshift mutation in a gene is the addition or deletion of nucleotide bases in quantities that are not multiples of three. This is significant because proteins are encoded in groups of three nucleotides, which are read by cells. Each of these so-called "triplet codons" corresponds to a different one of the 20 amino acids needed to make a protein.

If the normal reading frame is changed by a mutation, the entire gene sequence will be misread following the mutation. This could result in the protein receiving the wrong amino acids or developing a codon that inhibits the protein from getting longer.

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Implement the containment test ( __contains__ ) for the Gene class to be able to check if a given codon is part of the gene sequence. E.g. the following test should return True :
Codon("ACT") in Gene("GGCACT")

Answers

In this implementation, the __contains__ method checks if the sequence attribute of the codon object is contained within the sequence attribute of the Gene object. If it is, the method returns True, indicating that the codon is part of the gene sequence. If it is not, the method returns False.

class Gene:

   def __init__(self, sequence):

       self.sequence = sequence

 def __contains__(self, codon):

       return codon.sequence in self.sequence

# Test the implementation

codon = Codon("ACT")

gene = Gene("GGCACT")

print(codon in gene) # Should print True

What is genes?

The study of genes, genetic diversity, and heredity in organisms is known as genetics. It is a significant field of biology since heredity is essential to the evolution of organisms. Gregor Mendel, a Moravian Augustinian monk working in Brno in the nineteenth century, was the first to do scientific research on genetics. The fundamental unit of inheritance passed down from parent to kid. Genes are made up of DNA sequences that are ordered one after the other in the nucleus of cells at specified positions on chromosomes.

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Autotrophic bacteria, such as Cyanobacteria, are important to the evolution and advancements of other life on Earth because they...

were thought to have become mitochondria in the cells of animals.

were the first group of organisms to leave a fossil record.

were the first lifeform on earth. |

produced oxygen from photosynthesis.

Answers

Answer:

D. Produced oxygen from photosynthesis.

Explanation:

Autotrophic bacteria, such as Cyanobacteria, are important to the evolution and advancements of other life on Earth because they produced oxygen from photosynthesis. Autotrophic bacteria are organisms that can produce their own food from simple inorganic materials using energy from light or chemicals. Cyanobacteria are among the oldest known autotrophic bacteria, and they are credited with producing the first significant amounts of oxygen in the Earth's atmosphere. This process of photosynthesis created an oxygen-rich environment that allowed for the evolution of new forms of life, including the first multicellular organisms. Over time, the presence of oxygen also led to the evolution of complex life forms, such as plants and animals. In this sense, the evolution of autotrophic bacteria played a crucial role in shaping the environment and supporting the evolution of life on Earth.

Transection (cutting) of the hypothalamo-hypophyseal tract, but NOT the hypophyseal portal venules, would prevent the secretion of which of the following?A)posterior pituitary hormonesB)anterior and posterior pituitary hormonesC)releasing and inhibiting hormonesD)anterior pituitary hormones

Answers

Answer:

it’s A

Explanation:

Which of the following is NOT a way humans disrupt the carbon cycle?

Question 28 options:

replacing natural environments with human structures


using excessive fertilizers


deforestation


burning fossil fuels

Answers

Answer: Exceesive fertilzers

Explanation:

I think its this because you burn fossil fuels and the fuels you are putting out bad gasses witch could affect the carbon cycle. also deforestation since tree give out carbon so when you cut them down lees carbon is in the air.

the common configurations for air-to-air heat pump systems based on the source of heat and what medium the appliance ultimately treats __________

Answers

The common configurations for air-to-air heat pump systems are based on the source of heat and the appliance ultimately treats geothermal heat.


Renewable energy derived from the Earth's core is known as geothermal energy. It comes from the heat created when the planet first formed and from the radioactive decay of atoms. This thermal energy is found in the rocks and liquids of the earth's core.

There are two types of geothermal heat pumps: closed-loop systems and open-loop systems. In open loop or water source systems, the heat transmission medium is earthly water. Closed loop or earth-coupled systems that are submerged in the ground or a lake employ heat transfer fluid.


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Please match the statements to the term they describe to test your understanding of the structure of an antibody molecule.
1. The two arms that bind to antigen
2. Part of antibody involved in binding to various cells and molecules of the immune response
3. Region between Fab and Fc that allows swiveling of the Fab
4. Holds polypeptide chains together

Answers

1) Fab (Fragment antigen-binding), 2) Fc (Fragment crystallizable), 3) Hin_ge region, 4) Constant region.

What do you mean by Fragment crystallizable?

The Fragment crystallizable (Fc) region is a part of an antibody molecule that is responsible for its interaction with other cells and molecules of the immune system. It is the portion of the antibody that is not involved in the specific recognition and binding to antigens, but instead plays a role in modulating the immune response.

The Fc region is located at the end of the antibody molecule and is composed of a constant region, which is the same in all antibodies of a particular class (such as IgG, IgA, IgM, etc.) This region is composed of a series of repeating amino acid sequences and is responsible for the stability and solubility of the antibody.

The Fc region also contains sites that allow it to bind to other components of the immune system, such as Fc receptors on the surface of immune cells, complement proteins, and other antibodies. This binding allows the antibody to mediate various functions, such as the clearance of antigens, the enhancement of phagocytosis, and the activation of the complement cascade.

In summary, the Fc region is an important part of the antibody molecule, as it is responsible for its interaction with other components of the immune system and modulates the overall immune response to antigens.

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Which of the following forces of evolution increases (on average) genetic diversity within one population? Select all that are correct Genetic drift Natural selection (for new allele conferring fitness benefit) Migration Mutation

Answers

The evolutionary mechanisms which increase the genetic diversity in a population are mutation and migration.

Genetic diversity is always dynamic both across space as well as through time. Typically, the amount as well as the type of the genetic diversity within a species which varies across their natural range. Additionally, the genetic diversity changes over a period of time in the long term, and sometimes it occurs over shorter time frames such as a less number of generations of the species.

Migration is basically  the movement of the genetic diversity which occurs usually within a species. In plants, this process occurs through the pollen dispersal, seed dispersal, as well as the movement of vegetative propagules. Genetic mutation is the change in the sequence of the DNA which occurs randomly. Mutation and migration increase genetic diversity.

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Which of the following processes randomly effect (i.e. you cannot calculate the precise end result) the change in allelic frequencies over time?
a.nonrandom mating and migration
b.mutation and natural selection
c.genetic drift and mutation
d.gene flow

Answers

Genetic drift and mutation randomly affect (i.e. you cannot calculate the precise end result) the change in allelic frequencies over time. Option c is the right choice.

The shift in the prevalence of an existing gene variant (allele) in a population brought on by random chance is referred to as genetic drift, also known as allelic drift or the Wright effect.

Gene variations may totally vanish due to genetic drift, which would limit genetic diversity.

Additionally, it has the potential to make previously uncommon alleles far more common and even fixed.

The impact of genetic drift is more pronounced and less pronounced depending on how many copies of an allele are present. The relative relevance of neutral processes, such as genetic drift, vs natural selection was the subject of heated discussions in the middle of the 20th century. Ronald Fisher, who used Mendelian genetics to explain natural selection, maintained the predominate view for many years that genetic drift only has a modest influence on evolution.

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Which of the following is a characteristic of the cell membrane?impermeablefully permeablesemipermeablenot permeable

Answers

The cell membrane is a selectively permeable barrier that regulates the flow of substances in and out of the cell.

What is the role of cell membrane?

The cell membrane is a selectively permeable barrier that regulates the flow of substances in and out of the cell. It allows some substances, such as oxygen and water, to cross the membrane easily, while excluding others, such as large molecules and ions. The term "semipermeable" describes this selective permeability, meaning that the membrane is partially permeable and can control the flow of specific substances.

The cell membrane, also known as the plasma membrane, plays a critical role in maintaining the structural integrity of the cell and regulating its interactions with the external environment. Some of the main functions of the cell membrane are:

Selective permeability: As mentioned before, the cell membrane is selectively permeable, which means that it can control the flow of substances in and out of the cell.

Protection: The cell membrane protects the cell and its contents from damage and external threats, such as bacteria and viruses.

Cell signaling: The cell membrane contains proteins that are involved in cell signaling and communication with other cells.

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