Answer:
Red blood cells and blood plasma do not contain DNA. Red blood cells don't have the DNA containing nucleus and mitochondria. Only white blood cells in blood contain DNA. With blood donation, usually most of the white blood cells are filtered out.
Explanation:
because red blood cells don't have the DNA containing nucleus and mitochondria
state the principal of independent assortment below
The Law of Independent Assortment states that during a dihybrid cross (crossing of two pairs of traits), an assortment of each pair of traits is independent of the other.
Explanation:
Hope it helps you!!What is the test variable in science
Answer:
Anything that can change
Explanation:
Which of the following best describes an ecosystem in a neighborhood garden?
(A)the tomato plants, the fungi, and the soil
(B)the basil plants
(C)the tomato plants and the fungi
Answer:
Hey bro Ur answer is A)
Explanation:
The definition of an ecosystem is that ecosystem consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows.
The tomato plants, the fungi, and the soil all interact to sustain each other.
Which of the following is NOT an example of metabolism
a.
building up of larger molecules from smaller ones
b.
releasing energy to perform specific body functions
c.
controlling the basic functions and activities of the cell
d.
breaking down of larger molecules or substances into smaller ones
Answer:
c.
Explanation:
A. is a type of metabolism called anabolism
B. is a type of metabolism called catabolism
D. is often the result/purpose of catabolism
C. the basic functions and activities of the cell is considered metabolism.
Which of the following layers of the atmosphere where the molecules are gravitationally bound to that body?
a.
Thermosphere
b.
Exosphere
c.
Stratosphere
d.
Mesosphere
Answer:
b.
Explanation:
The air in the exosphere is very thin, and is made up mostly of helium, and hydrogen which traces other gases such as atomic oxygen and carbon dioxide.
Proteins in the cell membrane that identify the cell are called
A. enzymes
B. transport proteins
C. cell-surface markers
D. receptor proteins
Answer:
Proteins in the cell membrane that identify the cell are called cell-surface markers (option C).
Explanation:
Cell surface markers are integral membrane proteins, whose function is to identify specific cell lines, allowing intercellular recognition and communication.
The specific type of cell marker provides the basis for cell classification, allowing studies to be performed on immune system cells, stem cells or atypical cells such as those found in cancer.
The other options are not correct because:
A. Enzymes are proteins that participate in metabolic reactions.
B. Transport proteins, although they are also part of membrane proteins, perominate the passage of specific substances through the membrane.
D. Receptor proteins allow the identification of specific molecules, such as hormones, to couple with them and promote actions inside the cell.
Proteins in the cell membrane that identify the cell are called CELL-SURFACE markers (Option C).
Cell surface markers are specific proteins localized on the cell surface or glycoproteins, which can be used as molecular markers that evidence specific cell types/lineages.
For example, cell surface markers can be used for the identification of the lineage and/or phase of differentiation in lymphocytes such as T cells and B cells.
In lymphocytes, the cell surface markers can be divided into three classes: surface immunoglobulins, differentiation antigens, and membrane receptors.
In conclusion, proteins in the cell membrane that identify the cell are called CELL-SURFACE markers (Option C).
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The law of supply and demand states that a product becomes more valuable if:
O It has a short demand and is in O short supply.
It has a great demand but is in short supply.
O It has a great demand and is in great supply.
O It has a short demand but is in great supply.
Answer:
it has a short demand but it is in great supply
The law of conservation of energy states that energy cannot be created or destroyed, but energy can change:.
Arteries near the heart expand as blood rushes in after each contraction. Which component in the arteries allows this expansion? (2 points)
Connective tissue in the tunica media
Smooth muscle in the tunica media
Endothelium in the tunica intima
Elastin protein in the tunica intima
Answer: The elastic connective tissue
Explanation: Allow stretched tissues to recoil as pressure is reduced
Answer: D
Explanation:
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Say something nice
You're a gift to those around you. You're a smart cookie. You are awesome! You have impeccable manners. People would always want to be your friend! you are always cool .
Which of the following is a common health consequence of limited physical activities and no exercise?
Increased risk of Type 2 diabetes and heart disease
Slower reaction times and blurred vision or speech
Increased risk of cancer due to UV light sensitivity
Stronger immune system and decreased illness
Increased risk of Type 2 diabetes and heart disease is a common health consequence of lack of physical activities and Exercises.
Physical activities and Exercises.Physical activities and Exercises refer to various body movements or activities that are carried out by individuals for good health and well-being.
Some of these activities or exercises including dancing, walking,cycling, jumping, playing and so on.
Therefore, Increased risk of Type 2 diabetes and heart disease is a common health consequence of lack of physical activities and Exercises because these activities help to burn fat and excess glucose. It improve the proper conditioning of the heart and gives vitality to the body. Type 2 diabetes is as a result of too much accumulation of glucose that are not burn.
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Answer: The answer is A.
Explanation: Took the test
Which best describes how the photosystems are used in the light-dependent reactions?
photosystem I is used first then photosystem II
photosystem II is used first then photosystem I
Both processes are used at the same time.
Both processes are used during the light-independent reactions.
Answer:
B. photosystem II is used first then photosystem I
Photosynthesis is a series of metabolic reactions that convert sunlight, water and CO2 into sugar and oxygen. The reactions in photosynthesis can be divided into light-dependent and light-independent reactions.
The statement "photosystem II is used first then photosystem I" BEST describes how the photosystems are used in light-dependent reactions.Photosystem I (PSI) and photosystem (PSII) are protein complexes localized in the thylakoid membrane of the chloroplast.During light-dependent reactions, energy from sunlight is absorbed by chlorophyll of the photosystems. Subsequently, this energy is then converted into chemical energy (ATP and NADPH), a process that involves the transference of electrons.Both photosystem I and photosystem II contain pigments to collect sunlight energy and a reaction center in which excited electrons can be transferred from chlorophyll to an electron acceptor.Photosystem II is upstream in the electron flow pathway, but this photosystem (PSII) was discovered after photosystem I.Subsequently, electron flow is coupled to the generation of an electrochemical proton (H+) gradient across the thylakoid membrane, which is used to synthesize ATP by an ATP synthetase.In conclusion, the statement "photosystem II is used first then photosystem I" BEST describes how the photosystems are used in light-dependent reactions.
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follow the steps outlined below to determine whether each solution is hypotonic, hypertonic, or isotonic to the cell
Answer:
the solution is hypotonic if there is a lower solute concentration in the solution than in the cell
the solution is isotonic if the solute concentration is equal in the cell and solution
the solution is hyperotonic if there is a higher solute concentration in the solution than in the cell
Determine what type of tonicity describes the cell when compared to the described solution: an Isotonic Cell(s), Hypotonic Cell(s), or Hypertonic Cell(s): The concentration of dissolved substances (stuff) in the solution is lower than the concentration inside the cell.
Answer:
Hypotonic Tonicity
Explanation:
Hypotonic tonicity is when the concentration of dissolved substances is lower in the solution outside the cell than the concentration inside the cell.
Which of the following factors are considered abiotic?
A. Rain
B. Bacteria
C. soil
Answer:
rain
Explanation:
i did some research and i hope i got this right if it isn't pls let me know
Which of these tasks would a hydrologist be most likely to perform?
A. Determining the species of a recently collected specimen
B. Estimating the age of recently discovered fossils
C. Estimating the amount of groundwater in an aquifer
D. Determining the best method to extract underground oil
Hydrologists are most likely to perform actions relating to estimating the amount of groundwater in an aquifer.
HydrologistsHydrologists are scientists that specialize in the study of how water relates to the various crusts of the earth.
Hydrology in itself refers to the branch of science that studies how water moves relative to the earth's crusts.
Thus, species identification, age of fossils, or extracting underground oils have nothing to do with the work of hydrologists.
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Wood is a substance that burns in the presence of oxygen. Which best describes this property of wood?
O reactive
O combustible
metallic
O sour
Which of the following is NOT a type of renewable energy?
A: Solar
B: Biomass
C: Nuclear
D: Geothermal
4. An increase in calcium concentration in the sarcoplasm will cause which of the following?
A. displacement of troponin tropomyosin complex from the actin binding sites
B. muscle relaxation
C. rapid repolarization of the muscle membrane
D. breaking of the actin/myosin cross-bridges
E. activation of calcium pumps in the sarcoplasmic reticulum
Answer:
B. muscle relaxation
Explanation:
Sarcoplasmic reticulum store intracellular calcium in skeletal muscle cells.
The concentration of calcium helps in the contraction and relaxation of muscles. During depolarization, the calcium concentration increases that change conformation of troponin and tropomyosin and allows the actin to bind with myosin, resulting into relaxation of the muscle cell.
Hence, the correct option is "B. muscle relaxation".
Which word is a synonym for leave?
Sprout
Depart
Enter
Return
Answer:
B
Explanation:
This is an English subject, not biology. But the answer is Depart.
Depart is a synonym for leave.
Cell Differentiation and Specialization
Pre-Test
Active
2
3
4
5
6
7
8
10
Which type of cell is capable of self-renewal?
O stem cell
O blood cell
O muscle cell
O neuron
Answer:
blood cell
Explanation:
because bloodcell rotating all over the body
Answer: Stem Cell
(Got it right on edg.)
what is qualitative in biology
Answer:
To describe or define the characteristics of measurements, or recations.
Which stage of the cell cycle is the stage where the nucleus of the cell divides?
Answer:
Mitotic | Anaphase
Explanation:
Some organelles, such as the endoplasmic reticulum and Golgi bodies, have a large and folded structure. What is an advantage of these organelles having a folded structure?
* A. The folding causes the cytoplasm to flow throughout cell and speeds up nutrient transport.
* B.
Protein packaging speeds up with the increased surface area created by the folding.
* C.
The folds trap water, carbohydrates, and proteins until the cell can digest them.
* D.
Nutrients and gases travel along the folds until the cell uses them.
the ability to move things through them
Explanation:
An advantage of the organelles having a folded structure is that protein packaging speeds up with the increased surface area created by the folding. The correct option is B.
What is cell organelle?An organelle is a subcellular structure that, like an organ, has one or more specific jobs to do in the cell.
The nuclei, which store genetic information, mitochondria, which produce chemical energy, and ribosomes, which assemble proteins, are among the more important cell organelles.
They are involved in a variety of processes, including energy production, protein and secretion formation, toxin elimination, and response to external signals.
They increase the surface area of the inner membrane, allowing more proteins and ion exchange across the membrane, allowing the mitochondrion to do its job faster.
The folds within the mitochondria function to increase the surface area of the mitochondrial membrane.
Thus, the correct option is B.
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Hemoglobin is a quaternary protein
structure on a red blood cell involved in
oxygen transport. Hemoglobin A1 has two
a-chains and two ß-chains. Hemoglobin A2
has two a-chains and two & chains. In spite
of the structural differences, both
hemoglobin A1 and A2 perform the same
functions.
Which of the following statements explains
why both hemoglobin types perform the
same functions?
Answer:
hemoglobin binds to oxygen and releases it near cells that are performing cellular respiration
Answer:
The amino acid sequences changed the alpha and beta chains because of molecular interaction.
Which describes slate? non-foliated igneous does not split into layers grains arranged in parallel layers
The answer is D. Grains arranged in parallel layers.
Answer:
D. arranged in parallel layers
Explanation:
I just took the test and if you see an image of slate then you will see it is arranged with parallel layers.
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In living substances, the hydrolysis of ATP to ADP and P is virtually the sole supply of energy. However, ATP does not release this energy spontaneously but only in cell machinery where some work is being carried out. In such cases, special enzymes (ATPases) are necessary for the hydrolysis of ATP. How does the universality of ATP and the diversity of enzyme systems relate to the unity and diversity of life through evolution?
Answer
Cells use the hydrolysis of adenosine triphosphate, abbreviated as ATP, as a source of energy. Symbolically, this reaction can be written as
[tex]ATP(aq)+H_{2}0(l)- > ADP(aq)+H_{2} PO\frac{}{4} (aq)[/tex]
where ADP represents adenosine diphosphate. For this reaction, a. Calculate at b. If all the free energy from the metabolism of glucose
[tex]C_{6} H_{12}O_6(s)+6O_2(g)- > 6CO_2(g)+6H_2O(l)[/tex]
goes into forming ATP from ADP, how many ATP molecules can be produced for every molecule of glucose?
[tex]C_6H_1_2O_6(s)+O_2(g)- > 6CO_2(g)+6H_2O(l)[/tex]
goes into forming ATP from ADP, how many ATP molecules can be produced for every molecule of glucose?
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This pedigree tracks a recessive trait. What could person 3's genotype be?
Select all possibilities,
Based on the pedigree and the recessive nature of the trait, it can be concluded that the genotype of Person 3 is Aa.
What is recessive trait?A recessive trait is a trait or character encoded by a recessive gene.
A recessive trait does not appear in every generation bit only appears in the absence of the dominant trait.
From the pedigree shown, the recessive trait is h0m0zygous in 2 while 1 is heterozygous for the trait.
Person 3 is heterozygous recessive for the trait too.
Therefore, the genotype of person 3 is Aa.
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what level of organization in protein structure are hydrogen bonds within molecules?
Answer:
Proteins have four levels of organization. Primary structure refers to the linear sequence of the amino acids connected by the peptide bonds. The secondary structure consists of local packing of polypeptide chain into α-helices and β-sheets due to hydrogen bonds between peptide bond – central carbon backbone.
Explanation:
Secondary structure is the level of organization in protein structure where are hydrogen bonds within molecules.
The secondary structure is the folding that the polypeptide chain adopts thanks to the formation of hydrogen bonds between the atoms that form the peptide bond.
Hydrogen bonds are established between the -CO- and -NH- groups of the peptide bond (the first as an H acceptor, and the second as an H donor).
In this way, the polypeptide chain is capable of adopting lower free energy conformations, and therefore more stable.
Several types of conformations can be distinguished that determine the secondary structure of a protein :
α-helices.β-sheets.
Therefore, we can conclude that secondary structure is the level of organization in protein structure where are hydrogen bonds within molecules.
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