Proteins & Nucleic Acids

Question 1

Determine which vitamin precursor would be derived from the enzyme.

Pyridoxal Phosphate (PLP)

A. Vitamin B1
B. Vitamin B2
C. Vitamin B3
D. Vitamin B6

Answer 1

D. Vitamin B6

Question 2

Determine which vitamin precursor would be derived from the enzyme.

Thiamine Pyrophosphate (TPP)

A. Vitamin B1
B. Vitamin B2
C. Vitamin B3
D. Vitamin B6

Answer 2

A. Vitamin B1

Question 3

Determine which vitamin precursor would be derived from the enzyme.

Flavin Adenine Dinucleotide (FAD)

A. Vitamin B1
B. Vitamin B2
C. Vitamin B3
D. Vitamin B6

Answer 3

B. Vitamin B2

Question 4

Determine which vitamin precursor would be derived from the enzyme.

Nicotinamide Adenine Dinucleotide (NAD)

A. Vitamin B1
B. Vitamin B2
C. Vitamin B3
D. Vitamin B6

Answer 4

C. Vitamin B3

Question 5

Among the 21 AAs, which AA is achiral?

Answer 5

glycine

Question 6

Which 2 amino acids contain sulfur?

Answer 6

Cysteine and Methothione

Question 7

Which 3 amino acids contain hydroxyl?

Answer 7

Serine, Threonine and Tyrosine

Question 8

Amino acids are ___ at acidic environments and have a net ____ charge

A. Pronated, positive
B. Pronated, negative
C. Deprotonated, positive
D. Deprotonated, negative

Answer 8

A. Pronated, positive

Question 9

Amino acids are ___ at alkaline environments and have a net ____ charge

A. Pronated, positive
B. Pronated, negative
C. Deprotonated, positive
D. Deprotonated, negative

Answer 9

D. Deprotonated, negative

Question 10

AAs is bonded by peptide bonds

A. Primary structure
B. Secondary structure
C. Tertiary structure
D. Quaternary structure

Answer 10

A. Primary structure

Question 11

Interactions of R groups in the polypeptide

A. Primary structure
B. Secondary structure
C. Tertiary structure
D. Quaternary structure

Answer 11

C. Tertiary structure

Question 12

Interactions in the polypeptide backbone

A. Primary structure
B. Secondary structure
C. Tertiary structure
D. Quaternary structure

Answer 12

B. Secondary structure

Question 13

Highest level of confirmation for single protein molecule

A. Primary structure
B. Secondary structure
C. Tertiary structure
D. Quaternary structure

Answer 13

C. Tertiary structure

Question 14

Usually exhibit hydrogen bonding, ionic bonding, and the likes

A. Primary structure
B. Secondary structure
C. Tertiary structure
D. Quaternary structure

Answer 14

C. Tertiary structure

Question 15

Interactions between 2 or more polypeptides

A. Primary structure
B. Secondary structure
C. Tertiary structure
D. Quaternary structure

Answer 15

D. Quaternary structure

Question 16

Loss of secondary, tertiary and quaternary structure due to heat, changes in pH, or chemical treatment

Answer 16

Denaturation

Question 17

TRUE OR FALSE: enzymes are proteins

Answer 17

True

Question 18

Required for enzyme activity

A. Cofactor
B. Coenzyme

Answer 18

A. Cofactor

Question 19

Associates with enzyme and affects their activity

A. Cofactor
B. Coenzyme

Answer 19

B. Coenzyme

Question 20

What are pyrimidine nucleobases?

Answer 20

Cytosine
Uracil
Thymine

Question 21

What are purine nucleobases

Answer 21

Adenine and guanine

Question 22

Building blocks of nucleic acids

A. Nucleoside
B. Nucleotide

Answer 22

B. Nucleotide

Question 23

ATP

A. Nucleoside
B. Nucleotide

Answer 23

B. Nucleotide

Question 24

Nucleobase + Ribose

A. Nucleoside
B. Nucleotide

Answer 24

A. Nucleoside

Question 25

What makes tyrosine polar?

Answer 25

Hydroxyl (-OH)