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WorksheetsAmino Acids and Proteins Quiz
Total questions: 20
Worksheet time: 10mins
Which of the following is a purely ketogenic amino acid?
Leucine
Lysine
Phenylalanine
Valine
Which amino acids are sulfur-containing?
Cysteine and Methionine
Glycine and Serine
Tyrosine and Tryptophan
Proline and Alanine
Which of the following is NOT an aromatic amino acid?
Tyrosine
Phenylalanine
Tryptophan
Threonine
Which of the following is a neutral amino acid?
Alanine
Glutamic acid
Arginine
Lysine
Nitric oxide is synthesized from which amino acid?
Arginine
Glycine
Glutamate
Histidine
Which enzyme catalyzes the formation of nitric oxide?
Nitric oxide synthase
Arginase
Decarboxylase
Transaminase
Which is a transport form of methyl group in transmethylation?
S-Adenosylmethionine (SAM)
Folic acid
Vitamin B12
Methionine
What is the function of SAM?
Methyl group donor
Nucleotide precursor
Coenzyme in redox reactions
Ammonia transporter
The term 'folate trap' refers to trapping of folate in which form?
N5-methyl THF
N10-formyl THF
N5,N10-methylene THF
THF
Which vitamin deficiency leads to folate trap?
Vitamin B12
Folic acid
Vitamin B6
Vitamin C
Which of the following is a specialized product of tryptophan?
Serotonin
Melatonin
Niacin
All of the above
Which structure is a right-handed coiled configuration of peptide chain?
Alpha helix
Beta sheet
Random coil
Loop
What type of bonding stabilizes beta-pleated sheet?
Hydrogen bonding between adjacent chains
Disulfide bond
Ionic bonding
Van der Waals force
Collagen triple helix is stabilized by?
Hydroxyproline cross-links
Glycine-glycine bonds
Sulfhydryl groups
Tyrosine bridges
Hemoglobin has how many polypeptide chains?
4
2
3
6
Which of the following has a quaternary structure?
Hemoglobin
Insulin
Collagen
All of the above
Which structure is primarily seen in insulin?
2 peptide chains with disulfide bonds
Triple helix
4 polypeptides
Alpha helices only
Which amino acid is the precursor of serotonin?
Tryptophan
Tyrosine
Phenylalanine
Histidine
Which of the following is an example of protein with fibrous structure?
Collagen
Insulin
Albumin
Globulin
Aromatic amino acids include all EXCEPT?
Histidine
Phenylalanine
Tyrosine
Tryptophan
