The protein cytochrome c contains between 100 and 104 amino acids. A comparison of cytochrome c amino acids in several species yielded the following information: 13 differences between humans and dogs, 17 differences between monkeys and chickens, 27 differences between turtles and tuna, and 31 differences between moths and chickens. Based on the data above, which two species are most closely related?

Question

Quizplus · Accepted Answer

The fewer the differences in the amino acid sequences of cytochrome c between two species, the more closely related they are. Humans and dogs have the fewest differences (13), indicating they are the most closely related among the options provided.

The Protein Cytochrome C Contains Between 100 and 104 Amino