Question

The amino acid sequence of cytochrome c is exactly the same in humans and chimpanzees. There is a difference of 13 amino acids between the cytochrome c of humans and dogs, and a difference of 20 amino acids between the cytochrome c of humans and rattle snakes. Which of the following is best supported by these data?
a. Rattlesnakes apparently gave rise evolutionarily to the dog, chimpanzee, and human.
b. Cytochrome c apparently has an entirely different function in rattlesnakes than in mammals, which explains the difference in the number of amino acids.
c. Cytochrome c is not found universally in animals.
d. Cytochrome c from a rattlesnake could function in a dog, but not in a chimpanzee.
e. The human is apparently more closely related to the chimpanzee than to the dog or rattlesnake.

Answer 1

Answer:

The correct answer is: E) The human is apparently more closely related to the chimpanzee than to the dog or rattlesnake.

Explanation:

Cytochrome C is a protein found in mitochondria, so all organisms with mitochondria (eukaryotes) should have it. This means that option C is false, because this protein is found in every animal. Besides, not a single portion of the data supports that idea.

Options A and B are not supported by the data, since the data only informs about the difference in amino acids between cytochromes.

Option D is incorrect because the cytochrome in dogs and rattlesnakes are not the same (otherwise, there wouldn't be a 13-amino-acid-difference with one species and a 20-amino-acid-difference with the other.

Option E is the correct option: if humans and chimpanzees share the same amino acid sequence for Cytochrome C, it means that they are more closely related than humans and rattlesnakes that have a 20-amino-acid-difference.

Answer 2

Answer:

Option-(E): The human is apparently more closely related to the chimpanzee than to the dog or rattlesnake.                            

Explanation:

1. Humans are primates and that s why we can argue that we are more closely related to the chimpanzees, as there are more similarities inside the genome and the sequences of the amino acids of the two species. And, thus they result in arrangement of both the species inside the same taxonomic level.
2. While, the rattle snake and dog are far more different when it comes to the over all sequences of amino acid inside the living beings cellular structure.