Biochemistry: Proteins

Question 1

What structure of amino acid dictates the function of the amino acid in a protein?

Answer 1

R group or Side chain

Question 2

Amino acid with smallest side chain

Answer 2

Glycine

Question 3

Branched chain amino acids

Answer 3

Valine, Leucine, Isoleucine

Question 4

What amino acid is used for the first step of heme synthesis

Answer 4

Glycine

Glycine + Succinyl CoA ➡️ ALA

Question 5

Amino acid that accumulates in phenylketonuria

Answer 5

Phenylalanine

Question 6

Precursor for niacin, serotonin and melatonin

Answer 6

Tryptophan

Question 7

Precursor of Tyrosine

Answer 7

Phenylalanine

Question 8

Precursor of homocysteine and cysteine

Answer 8

Methionine

Question 9

Amino acid which is a source of methyl grouos in metabolism

Answer 9

Methionine

Question 10

An amino acid that contributes to the fibrous structure of collagen and interrupts alpha helices in globular proteins

Answer 10

Proline

Question 11

Amino acid which is a precursor of thyroxine and melanin

Answer 11

Tyrosine

Question 12

Amino acid which is a site for N-linked glycosylation of proteins

Answer 12

Asparagine

Question 13

A sulfur containing amino acid which participates in the biosynthesis of coenzyme A

Answer 13

Cysteine

Question 14

Amino acids: site of O linked gylcosylation

Answer 14

Serine
Threonine
Tyrosine

Question 15

Precursor of Catecholamines

Answer 15

Tyrosine

Question 16

Amino acids which accumulate in Maple Syrup Diseases

Answer 16

Valine, Leucine, Isoleucine

Question 17

Amino acid with Largest side chain

Answer 17

Tryoptophan

Question 18

Acidic Charged Amino Acids

Answer 18

Aspartate and Glutamate

Question 19

Amino acid: Precursor of major inhibitory neurotransmitter in the brain

Answer 19

Glutamate

Question 20

Amino acid: It is the major excitatory neurotransmitter in the brain.

Answer 20

Glutamate

Question 21

Amino acid used in the diagnosis of Folic Acid Deficiency

Answer 21

Histidine

Question 22

Amino Acid: precursor of creatinine, urea and nitric oxide

Answer 22

Arginine

Question 23

Amino Acid: precursor of Carnitine

Answer 23

Lysine

Question 24

21st Amino Acid

Answer 24

Selenocysteine

Question 25

Amino acid which is a precursor of histamine

Answer 25

Histidine

Question 26

The weakest base charged amino acid

Answer 26

Histidine

Question 27

Amide containing polar uncharged amino acids

Answer 27

Asparagine | Glutamine

Question 28

What do you call the group of amino acids which forms hydrogen bonds A. Nonpolar B. Polar uncharged C. Charged

Answer 28

B. Polar uncharged Amino Acids

Question 29

Which amino acid is considered nutritionally semi essential?

Answer 29

Arginine

Question 30

These amino acids can be synthesized in the body but only from essential amino acid precursors

Answer 30

Cystine | Tyrosine