Amino Acids,Peptides and Proteins MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Amino Acids,Peptides and Proteins, a fundamental topic in the field of Biochemistry. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Amino Acids,Peptides and Proteins MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Amino Acids,Peptides and Proteins mcq questions that explore various aspects of Amino Acids,Peptides and Proteins problems. Each MCQ is crafted to challenge your understanding of Amino Acids,Peptides and Proteins principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Biochemistry tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Amino Acids,Peptides and Proteins MCQs are your pathway to success in mastering this essential Biochemistry topic.

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Amino Acids,Peptides and Proteins MCQs | Page 2 of 31

Discover more Topics under Biochemistry

Q11.
What is the end product of leucine metabolism?

a.

Acetyl-CoA

b.

Pyruvic acid

c.

Oxaloacetic acid

d.

Acetyl carnitine

Discuss
Answer: (a).Acetyl-CoA
Q12.
What is the heaviest of the twenty amino acids?

a.

Phenylalanine

b.

Tryptophan

c.

Tyrosine

d.

Histidine

Discuss
Answer: (b).Tryptophan
Q13.
Which of the following amino acids can form hydrogen bonds with their side (R) groups?

a.

Asparagine

b.

Aspartic acid

c.

Glutamine

d.

All of these

Discuss
Answer: (d).All of these
Q14.
When pO₂ = Kd of myoglobin, the fractional saturation (YO₂) is about

a.

0.1

b.

0.5

c.

0.9

d.

1.7

Discuss
Answer: (b).0.5
Q15.
Peptides in the fully extended chain conformation

a.

have Y = F = 180°

b.

do not occur in nature

c.

also have a cis geometry in their peptide bonds

d.

are equivalent to the (3-sheet structure

Discuss
Answer: (a).have Y = F = 180°
Q16.
The oxygen in hemoglobin and myoglobin is bound to

a.

the iron atom in the heme group

b.

the nitrogen atoms on the heme

c.

histidine residues in the protein

d.

lysine residues in the protein

Discuss
Answer: (a).the iron atom in the heme group
Q17.
Which of the three subunits of the G proteins binds GDP and GTP?

a.

Alpha

b.

Beta

c.

Gamma

d.

Delta

Discuss
Answer: (a).Alpha
Q18.
In deoxy hemoglobin (Hb), the Fe (II) is coordinated to

a.

four nitrogens of heme, the proximal His, and a water molecule

b.

four nitrogens of heme and to a water molecule

c.

two nitrogens of heme and to three His residues in Hb

d.

two nitrogens of heme and to three water molecules

Discuss
Answer: (a).four nitrogens of heme, the proximal His, and a water molecule
Q19.
The isoelectric point of an amino acid is defined as the pH

a.

where the molecule carries no electric charge

b.

where the carboxyl group is uncharged

c.

where the amino group is uncharged

d.

of maximum electrolytic mobility

Discuss
Answer: (a).where the molecule carries no electric charge
Q20.
The sulphur containing side chain of cysteine is

a.

ampiphillic, highly reactive and capable of reacting with another cysteine

b.

hydrophillc, highly reactive and capable of reacting with another cysteine

c.

hydrophobic, highly reactive and capable of reacting with another cysteine

d.

none of the above

Discuss
Answer: (c).hydrophobic, highly reactive and capable of reacting with another cysteine
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