Question

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

Organism A: Val-Ser-Thr-Val

Organism B: LExamine the amino acid sequences 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

A and C
A and C

B and C
B and C

A and B

Answer 1

To determine which two organisms are the most closely related based on their amino acid sequences, we can compare the sequences for similarities.

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

**Comparison:**

- **Organism A and Organism C:**
- Both share the amino acid "Val" at the first position and "Ser" at the second position.
- The third amino acids are different (Thr in A and Asp in C).
- The fourth amino acids are the same (Val in A).

- **Organism A and Organism B:**
- There are no matching amino acids in any position.

- **Organism B and Organism C:**
- There are no matching amino acids in any position.

Based on this comparison, **Organism A and Organism C** share more similarities (2 out of 4 amino acids) than A does with B or B does with C.

Therefore, the answer is **A and C**.