Deck 24: Amino Acids and Proteins

Question 1

The following structure is a(n) ___ . It contains the following amino acids, ___ , ___ and ___ .

A) tripeptide, alanine, phenylalanine, arginine
B) tripeptide, alanine, phenylalanine, glutamine
C) tetrapeptide, alanine, threonine, glutamic acid
D) tetrapeptide, alanine, serine, glutamine

Answer 1

tetrapeptide, alanine, serine, glutamine

Question 2

Which of the following are essential amino acids?

A) alanine
B) valine
C) glutamine
D) phenylalanine
E) cysteine
F) methionine
G) a, c, e
H) b, d, f

Answer 2

b, d, f

Question 3

Which of the following represents threonine at physiological pH?

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

Answer 3

III

Question 4

Which of the following represents aspartic acid at physiological pH?

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

Question 5

Which of the following represents lysine at physiological pH?

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

Question 6

What is the product of the following reaction?

A) valine
B) isoleucine
C) leucine
D) lysine

Question 7

What is the product of the following reaction?

A) Phenylalanine
B) Histidine
C) Proline
D) Tyrosine

Question 8

What is the product of the following reaction?

A) Cysteine
B) Serine
C) Tyrosine
D) Threonine

Question 9

What dipeptide is produced in the following reaction?

A) Isoleucine-alanine
B) Leucine-glycine
C) Valine-alanine
D) Threonine-glycine

Question 10

What is the product of the following reaction?

A) Histidine-cysteine
B) Glutamine-serine
C) Asparagine-threonine
D) Glutamine-tyrosine