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Examine the amino acid sequence from three organisms (A, B, and C). Which two organisms are the most closely related?

Organism A: Val-Ser-Thr-Val

Organism B: Leu-Ala-Leu-Ala

Organism C: Val-Ser-Asp-Met

(1 point)
Responses

B and C
B and C

A and C
A and C

A and B
A and B

They are all equally related.

1 answer

To determine which organisms are the most closely related based on their amino acid sequences, we can compare the sequences provided:

  • Organism A: Val-Ser-Thr-Val
  • Organism B: Leu-Ala-Leu-Ala
  • Organism C: Val-Ser-Asp-Met

A comparison can be made by looking at the presence of similar amino acids:

  1. Organism A and C share two amino acids in the same positions (Val and Ser).
  2. Organism A and B do not share any amino acids in the same positions.
  3. Organism B and C do not share any sequence similarities either.

Given this analysis, the most closely related organisms based on their amino acid sequences are:

A and C

So the answer is:

A and C