Gel electrophoresis is a technique used to separate DNA fragments according to their size.
DNA samples are loaded into wells (indentations) at one end of a gel, and an electric current is applied to pull them through the gel.
DNA fragments are negatively charged, so they move towards the positive electrode. Because all DNA fragments have the same amount of charge per mass, small fragments move through the gel faster than large ones.
When a gel is stained with a DNA-binding dye, the DNA fragments can be seen as bands, each representing a group of same-sized DNA fragments.
Introduction
what are gonadds ?
write down the hormones secreted by gonads with one function
Answer:
The gonads are responsible for the production of steroid hormones, such as testosterone, estrogen, and progesterone.
Explanation:
Answer:
Gonadotropin-releasing hormone (GnRH) secreted from the hypothalamus regulates the secretion of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the pituitary, and then FSH and LH act on the gonads to stimulate gonadal development and maturation.
A DNA molecule carries informaton that specifies some traits of an organism. This information is found in the -
A) order of nitrogenous bases in a single strand of nucleotides
B)shape of the molecule that is known as a double helix
C)number of different kinds of nucleotides in the molecule
D)kinds of nitrogenous bases that form complementary nucleotide pairs
Answer:
B - Shape of the molecule that is known as a double helix
Explanation:
Answer:
B. Shape of the molecule that is known as a double helix.
:]
How many amino acids will result from the following strand of DNA?
ACGCCCAA ATAC
A. 12 amino acids
B. 3 amino acids
C. 4 amino acids
Answer:
B, because the relationship between an mRNA codon and its corresponding amino acid is called the genetic code. The three-nucleotide code means that there is a total of 64 possible combinations (4 3, with four different nucleotides possible at each of the three different positions within the codon)
Explanation:
Hope this helps
Answer: b I think
Explanation:
The main enzyme responsible for linking nucleotides during DNA replication is
1.DNA polymerase
2.RNA polymerase
3.transfer RNA
4. Ribose
Anyone know the answers to this?
HELP WILL GIVE BRAINLY!! The dominant allele is not completely expressed when the recessive allele is present.
A.Complete Dominance
B. Codominance
C. Incomplete dominance
D. Polygenenic
Answer:
I will give you an explanation, and try to figure it out!!
Explanation:
Incomplete dominance can occur because neither of the two alleles is fully dominant over the other, or because the dominant allele does not fully dominate the recessive allele. This results in a phenotype that is different from both the dominant and recessive alleles, and appears to be a mixture of both.
What’s the answer please help
Answer:
I think the answer would be C because I don't think rocks and be recyled and due to the fact that they come out of caves or from places that use to have a cave or an Valcano.
Will Give Brainliest
Which of the following events would most likely contribute to lowering the carrying capacity of a population?
A.
an increase in the water supply in the habitat
B.
a decrease in habitats due to human development or natural disasters
C.
an increase in the number of predators who eat the animal
D.
a decrease in the number of females in the population
Answer:
a decrease in habitats due to human development or natural disasters
Explanation:
its right and brainliest
Answer:
For the other person to get Brainliest
I’ll give the Brainliest to who answers this question with a reasonable explanation.
Rebecca’s family uses their house’s heating system to stay warm in the winter. How do they know when their system is at equilibrium?
A. The house temperature balances the set temperature and the system shuts off.
B. The house temperature is changing and the system is rapidly changing from on to off then back again.
C. The house temperature is lower than the set temperature and heat is on.
D. The house temperature is higher than the set temperature and the cooling is on.
Thank you.
Answer: A
Explanation:
Answer:
A. The house temperature balances the set temperature and the system shuts off.
Explanation:
Equilibrium is a state in which the competing factors of a system are in balance. In the case of the heating system, the house temperature and set temperature would be the same and the system would turn off.
also just took test
One change in the body results in another change. This second change reverses the first change in order to maintain homeostasis. This sequence describes a type of
Answer:
Feedback loop
Explanation:
A feedback loop is a process in which the body tends to return to homeostasis if it deviates from normal conditions.
A feedback loop consists o three components a receptor, a control center and an effector.
There are two types of feedback loops namely, positive feedback loop and negative feedback loop.
In a negative feedback loop, the effect of the stimulus is to shut off the original stimulus or reduce its intensity, while in positive feedback loop, intensifies a change in the body's physiological condition.
cytosine thymine and uracil have a single ring structure and are classified as
Answer:
Pyrimidine
Explanation:
This is because pyrimidine are one of the two types of heterocyclic nitrogenous bases of RNA and DNA. They include uracil, cytosine and thymine in RNA. They have single structure and have nitrogen at position 1 and ring at 3. Pyrimidine are present in Vitamins such as ribloflavin, folic acid and thiamine. Pyrimidine derivatives have characteristics that are antiviral, antibacterial, antifungal, sedative e.t.c.
What takes place within the membranes of the chloroplast shown in the figure above ?
Answer:
Photosynthesis Takes Place in Chloroplasts. ... The inner membrane surrounds a stroma, which is the site of the carbon chemistry of photosynthes
Explanation:
Based on this information, is ebony body color or yellow-brown body color the dominant allele? Explain.
Based on the information, ebony or yellowish-brown body color exerts a codominance.
What is the dominant allele?Dominant alleles can be defined as those that, even in a single dose, manage to manifest themselves. This means that when a dominant allele is present, the organism may be homzygous or heterozygous, and the phenotype will still be expressed.
With this information, we can conclude that ebony or yellowish-brown body color exerts a codominance.
Learn more about Dominant alleles in brainly.com/question/14053639
I
5. The diagram below shows two kinds of cells.
Font
Arial
Regular
B
Character
A biologist wants to classify protein secretions into groups based on the principal function of the protein.
Which cell would the biologist select to study and why?
SC.912.L. 14.3
Alignment
A. The cell on the left, because it has genetic information organized into chromosomes.
B
B. The cell on the left, because it has organelles that secrete proteins.
C. The cell on the right, because it has free proteins throughout its cytoplasm.
D. The cell on the right, because it has a flagellum that enables movement.
Spaci
10
Bulle
Answer:
c
Explanation:
How are contaminants magnified up the food chain?
Answer:
Biomagnification also called food web magnification or food web accumulation is the progressive increase in the concentration of contaminants in organisms as the trophic level increases. These unexpectedly large concentrations are the result of DDT biomagnification up the food web.
Explanation:
Which of the following is NOT one of Sir Isaac Newton’s accomplishments?
a.He discovered gravity and showed that all objects fall at the same rate regardless of mass.
b.He developed the Universal Law of Gravitation that told the two things gravity depended on.
c.He realized that an object in motion will stay in motion unless acted on by an unbalanced force.
d.He discovered that every action force has equal but opposite reaction force.
What id one watt equal to?
_trophs often make their own food using sunlight,
carbon dioxide, and water.
Any body please help please thank you so muchhhhh
Answer:
Autotrophs
Explanation:
Hope this is helpful
Which of these organisms is a producer?
A: snake
B:Fern
C: bear
D:trout
Answer:
b fern
Explanation:
because its a plant and plants produce food for other oragnisams
Which cell organelle is labeled #2?
??
Answer:
Nucleus could I have brainliest sorry to bother.
Explanation:
PLEASE HELP ILL GIVE BRAINIEST
Answer:
Decomposers (Figure below) get nutrients and energy by breaking down dead organisms and animal wastes. Through this process, decomposers release nutrients, such as carbon and nitrogen, back into the environment. These nutrients are recycled back into the ecosystem so that the producers can use them.
Explanation:
Please help me on this!
Answer:
im pretty sure its B
Explanation:
The F1 cross was a cross between two
A. hybrids
B. clones
C. different varieties
Which has more steps to complete?
O meiosis
O mitosis
O osmosis
O neither
O No answer text provided.
You must draw a Punnett square and work out these problems to get the correct answers. In cats, long-hair (H) is dominant to short-hair (h). One cat is heterozygous for its long-hair and its mate has short-hair. First, use a Punnett square to determine the genotypes, phenotypes and probability of their possible offspring.
Answer:
The correct answer is -
Genotypes: 1 heterozygous dominant: 1 recessive
Phenotypes: 1 long hair cat: 1 short hair cat
probability: 50% chances of both long and short hair cats
Explanation:
It is given that long hair is a dominant represented by H, over the short hair represented by h. In the cross of a heterozygous cat for long hair with a cat with short hair, would produce H, h and h, h gametes respectively.
Cross: Hh × hh
H h
h Hh hh
h Hh hh
In this Punnett, there are two heterozygous long hair offspring produced and two short-hair cats.
So, Genotypes: 1 heterozygous dominant: 1 recessive
Phenotypes: 1 long hair cat: 1 short hair cat
probability: 50% chances of both long and short hair cats
Sea turtles lay a large number of eggs in the sand. When the eggs hatch, the baby sea
turtles make their way back to the ocean water. How does laying a large number of
eggs help the sea turtles survive?
Answer:
It helps the sea turtles to survive because there are seagulls and other predators at the beach, so they will eat at least some of the baby turtles. But, when there are a large amount, the predators will be distracted with another baby turtle and hopefully at least some will make it to the ocean.
Answer:
C. It increases the chance that more sea turtles will survive and become adults.
Explanation:
PLEASE ANSWER FAST DUE IN A FEW MINUTES!!!!!
Which of these describes a difference between viruses and cells? and tell me why.
A. Cells contain protein, and viruses contain only carbohydrates
B. Viruses have flagella, and cells have only cilia
C. Cells reproduce independently, and viruses require a host to reproduce
D. Viruses have membranes made of proteins and cells have membranes made of nucleic acid
Answer:
option C, is correct answer hope it helps
Answer:
I believe the answer is C. most cases viruses need hosts to reproduce and spread, for example the current virus all around the world.
Where are the 36 ATP come from during cellular respiration?
A. 2 from glycolysis, 2 from oxidation of pyruvate and 32 from Krebs cycle
B. 2 from glycolysis, 2 from Krebs cycle and 32 from electron transport chain
C. 2 from glycolysis, 2 from oxidation of pyruvate and 32 from electron transport chain
D. 2 from oxidation of pyruvate, 2 from Krebs cycle and 32 from electron transport chain
Use the original DNA sequence above to write an example of each of the following types of mutations: insertion, substitution, and frameshift.
For example: GGATACCTAGGTAAT
Insertion: GGATGACCTAGGTAAT
a nucleotide that was not present before is inserted into the original sequence
Substitution: CGATACCTAGGTAAT
the first nucleotide was substituted in for another (C for G)
Frameshift (basically a insertion or deletion, we'll try deletion here): GATACCTAGGTAAT
the first nucleotide was deleted, causing the reading frame to be shifted (instead of GGA as the first codon, we have GAT)
List the levels of organization of that makeup an organism, starting with an atom and ending with an organism.
Atom, molecule, organelle, cell, tissue, organ, organ system, organism
The levels of organization that makeup an organism are the degrees of increase in complexity of structures, from the atomic level to more complex ones. In this sense, the levels of organization of an organism are:
1. Atom
2. Molecule
3. Macromolecules
4. Cells
5. Tissue
6. Organs
7. System of organs or apparatus
8. Organism
The atom is the smallest fundamental unit of matter, it is made up of subatomic particles: protons, electrons, and neutrons.
Different combinations of similar or different atoms form molecules.
Macromolecules are large molecules, generally formed by polymerization of smaller units called monomers.
The cell is the essential structure for life, which is made up of different combinations of molecules.
Tissues are structures made up of combinations of cells.
Organs are a collection of tissues in a structure with a common function.
Organ systems is the system where organs are related to fulfill a systemic function.
An organism is an individual multicellular living being that has an independent existence, made up of a variety of systems.
Therefore, we can conclude the levels of organization of that makeup an organism are atoms, molecules, Macromolecules, cells, tissues, organs, organ systems and ending with an organism.
Learn more about levels of organization here: https://brainly.com/question/908825