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 22 of 31

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Q211.
Which of the following statements is true about ion-exchange chromatography?

a.

It separates proteins according to their size

b.

The column matrix with bound anionic groups is called cationic exchanger

c.

The column matrix with bound anionic groups is called anionic exchanger

d.

The column matrix with bound cationic groups is called cationic exchanger

Discuss
Answer: (b).The column matrix with bound anionic groups is called cationic exchanger
Q212.
Which of the following statements is true about SDS polyacrylamide chromatography?

a.

SDS polyacrylamide gel electrophoresis separates proteins on the basis of size

b.

SDS polyacrylamide gel electrophoresis separates proteins on the basis of charge

c.

SDS binds to proteins non-covalently with a stoichiometry of around one SDS molecule per three amino acids

d.

SDS binds to proteins non-covalently with a stoichiometry of around one SDS molecule per one amino acid

Discuss
Answer: (b).SDS polyacrylamide gel electrophoresis separates proteins on the basis of charge
Q213.
Which of the following statements is true about two-dimensional electrophoresis?

a.

Separates proteins of identical molecular weight, same pI but different charge

b.

Separates proteins of different molecular weight and different pI

c.

Separates proteins of identical molecular weight that differ in pI

d.

Isoelectric focusing is also termed as two-dimensional electrophoresis

Discuss
Answer: (c).Separates proteins of identical molecular weight that differ in pI
Q214.
Which of the following statements is false?

a.

The term activity refers to the total units of enzyme in a solution

b.

The specific activity is a measure of enzyme purity

c.

Specific activity increases during purification of an enzyme and becomes maximal and constant when the enzyme is pure

d.

Specific activity decreases during purification of an enzyme and becomes maximal and constant when the enzyme is pure

Discuss
Answer: (d).Specific activity decreases during purification of an enzyme and becomes maximal and constant when the enzyme is pure
Q215.
Which of the following statements is false?

a.

Primary structure of a protein determines how it folds up into a unique three dimensional structure

b.

Secondary structure of a protein determines how it folds up into a unique three dimensional structure

c.

Three dimensional structure of a protein determines the function of a protein

d.

Amino acid sequence is absolutely invariant for a particular protein

Discuss
Answer: (b).Secondary structure of a protein determines how it folds up into a unique three dimensional structure
Q216.
Who deduced the double-helical structure of DNA?

a.

Frederick Sanger

b.

Mendel

c.

Watson and Francis Crick

d.

Anton van Leeuwenhoek

Discuss
Answer: (c).Watson and Francis Crick
Q217.
Two chains of amino acids in an insulin molecule are held together by __________

a.

Sulfide bridges

b.

Disulfide bridges

c.

Peptide bond

d.

Covalent linkage

Discuss
Answer: (b).Disulfide bridges
Q218.
Tertiary conformation of proteins is maintained by 3 types of bonds namely ionic, hydrogen and __________

a.

Sulfide

b.

Disulfide

c.

Covalent

d.

Peptide

Discuss
Answer: (b).Disulfide
Q219.
Hemoglobin is a __________

a.

Monomer

b.

Dimer

c.

Trimer

d.

Tetramer

Discuss
Answer: (d).Tetramer
Q220.
Which of the following is false?

a.

The two main types of secondary structure are the α helix and β pleet structures

b.

α helix is a right handed coiled strand

c.

The hydrogen bonding in a β-sheet is between strands rather than within strands

d.

The hydrogen bonding in a β-sheet is within strands rather than between strands

Discuss
Answer: (d).The hydrogen bonding in a β-sheet is within strands rather than between strands
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