1. Which is true about the amino acids that have an isoelectric point at about p

ID: 882015 • Letter: 1

Question

1. Which is true about the amino acids that have an isoelectric point at about pH 10?

A) The side chain is basic.
B) The side chain is aromatic.
C) The side chain is acidic.
D) The side chain is nonpolar.
E) The side chain is polar.

2. Which of the following is a zwitterionic form for alanine?

A) I
B) II
C) III
D) IV

3. What is the correct sequence of amino acids for the tripeptide shown below?

A) Thr-Cys-Leu
B) Thr-Met-Leu
C) Ser-Cys-Ile
D) Ser-Met-Ile

4. What type of protein is hemoglobin classified as?

A) hormone
B) transport
C) regulatory
D) structural
E) protective
F) enzyme

5. Amino acids are amphoteric because they

A) react with only bases.
B) react only with acids.
C) react with neither acids nor bases.
D) react with both acids and bases.

1) A

2) B

3) B

4) D

5) D

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