SAT Subject Biology Practice Question 405: Answer and Explanation

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Question: 405

15.

If we were to continue adding to this molecule to increase its size, to which atom would the next portion be bonded?

A. 1
B. 2
C. 3
D. 4
E. 5

Correct Answer: D

Explanation:

D When a new amino acid is added to a protein, it is added at the carbon atom on the far right of the molecule. The OH group already attached to this carbon is lost as part of a water molecule.

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