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exis [7]
2 years ago
5

When scientists compare organisms at the molecular level, what are they actually studying to determine evolutionary relationship

s?
DNA and proteins
carbohydrates and sugars
anatomical structures
lipids and fatty acids
Biology
1 answer:
zavuch27 [327]2 years ago
7 0

Answer:

DNA and proteins

Explanation:

By comparing these specific molecules in two different species, scientists can determine how closely related the species are.

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Is the equation balanced? Why or why not?
diamong [38]

Answer:reaction, or reactants becoming products: A + B →. C + D reactants products ... CaCl2 has two Cl's because Ca is +2 charged so we need two –1 ... Due to the Law of Conservation, the number of atoms (and the mass) of each ... This is a balanced equation – same number of H and O atoms on both sides of the arrow.

Explanation:

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3 years ago
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Describe the effect of amanitin on the maximum elongation rate for the wild-type and modified RNA polymerases. Determine the rat
Ainat [17]

Answer:

Average max. elongation rate = modified RNA pol./ wild type RNA pol = 2/12 = 0.166 nucleotides per sec.

Explanation:

After treating the wild type and experimental RNA with amanitin solution, the amanitin actively binds to the active site of wild type RNA polymerase, inhibiting addition of nucleotides and also it interferes with the motility of RNA pol. along the DNA template, due to which their is a sharp decline in maximum elongation rate of mRNA. In case of experimental RNA polymerase, due to single base substitution the experimental strain is already having very low elongation rate, but binding of amanitin causes constraint on the motility of RNA polymerase through the DNA template, thereby decreasing the elongation rate. Average max. elongation rate = modified RNA pol./ wild type RNA pol = 2/12 = 0.166 nucleotides per sec.

3 0
3 years ago
Fill in the following flowchart to show the pathway of a red blood cell as
Alla [95]

Answer:

1. The pathway of a red blood cell from the right ventricle to the brain is:

<em>Right ventricle → pulmonary arteries → lungs → pulmonary veins → left atrium → left ventricle → artery aorta → arterial vessels → brain .</em>

2. The substance that forms hemoglobin in red blood cells when it passes through the lungs is oxyhemoglobin.

Explanation:

Red blood cells are structures present in the blood, whose function is to transport oxygen (O₂) and carbon dioxide (CO₂). This process requires travel throughout the body, through the blood vessels, and gas exchange at the pulmonary and tissue level.

1. A red blood cell in the right ventricle contains carbon dioxide and must pass to the lungs to be oxygenated. The route it takes from there includes Right ventricle (minor circulation) → pulmonary arteries → lungs → pulmonary veins → left atrium → left ventricle → (joining the major circulation) artery aorta → arterial vessels → brain .

2. The red blood cell or erythrocyte contains a molecule, called hemoglobin, which has an iron core that allows it to bind to O₂ and CO₂ in order to transport them. The affinity for one molecule or another depends on the presence of a certain gas in a certain place.

When the red blood cell passes through the lungs, the concentration of O₂ is higher than CO₂, so the latter is released and O₂ binds to hemoglobin, a conjugation that is called oxyhemoglobin.

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Hatshy [7]

Answer:

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Explanation:

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