Explore topic-wise MCQs in Biochemistry.

This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

What is the relationship between ∆G and ∆G‘°?

A. ∆G = ∆G‘° + RTln([products]/[reactants])
B. ∆G = ∆G‘° – RTln([products]/[reactants])
C. ∆G = ∆G‘° + RTln([reactants]/[products])
D. ∆G = ∆G‘° – RTln([reactants]/[products])
Answer» B. ∆G = ∆G‘° – RTln([products]/[reactants])
Discussion
2.

If ∆G‘° of the reaction A → B is -40kJ/mol under standard conditions then the reaction ____________

A. Will never reach equilibrium
B. Will not occur spontaneously
C. Will proceed at a rapid rate
D. Will proceed from left to right spontaneously
Answer» E.
Discussion
3.

The relationship between K‘eq and ∆G‘° is?

A. ∆G‘° = RTlnK‘eq
B. ∆G‘° = -RTK‘eq
C. ∆G‘° = RK‘eq
D. ∆G‘° = -RK‘eq
Answer» C. ∆G‘° = RK‘eq
Discussion
4.

The study of energy relationships and conversions in biological systems is called as ____________

A. Biophysics
B. Biotechnology
C. Bioenergetics
D. Microbiology
Answer» D. Microbiology
Discussion
5.

Unfolding of regular secondary protein structure causes ____________

A. Large decrease in the entropy of the protein
B. Little increase in the entropy of protein
C. No change in the entropy of the protein
D. Large increase in the entropy of the protein
Answer» E.
Discussion
6.

For a reaction if ∆G° is positive, then ____________

A. The products will be favored
B. The reactants will be favored
C. The concentration of the reactants and products will be equal
D. All of the reactant will be converted to products
Answer» C. The concentration of the reactants and products will be equal
Discussion
7.

∆G° is defined as the ____________

A. Residual energy present in the reactants at equilibrium
B. Residual energy present in the products at equilibrium
C. Difference in the residual energy of reactants and products at equilibrium
D. Energy required in converting one mole of reactants to one mole of products
Answer» E.
Discussion
8.

If enthalpy change for a reaction is zero, then ∆G° equals to _____________

A. -T∆S°
B. T∆S°
C. -∆H°
D. lnkeq
Answer» B. T∆S°
Discussion
9.

WHAT_IS_THE_RELATIONSHIP_BETWEEN_‚ÄÖ√Ñ√∂‚ÀւĆ‚ÀÖ√∫G_AND_‚ÄÖ√Ñ√∂‚ÀւĆ‚ÀÖ√∫G‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚Àւ§¬¨¬®‚ÄÖ√†√ª??$#

A. ∆G = ∆G<sup>‘°</sup> + RTln([products]/[reactants])
B. ∆G = ∆G<sup>‘°</sup> – RTln([products]/[reactants])
C. ∆G = ∆G<sup>‘°</sup> + RTln([reactants]/[products])
D. ∆G = ∆G<sup>‘°</sup> – RTln([reactants]/[products])
Answer» B. ‚Äö√Ñ√∂‚àö‚Ć‚àö√∫G = ‚Äö√Ñ√∂‚àö‚Ć‚àö√∫G<sup>‚Äö√Ñ√∂‚àö√ë‚àö‚⧬¨¬®‚Äö√†√ª</sup> ‚Äö√Ñ√∂‚àö√ë‚àö¬® RTln([products]/[reactants])
Discussion
10.

Which of the following statements is false?$

A. The reaction tends to go in the forward direction if ∆G is large and positive
B. The reaction tends to move in the backward direction if ∆G is large and negative
C. The system is at equilibrium if ∆G = 0
D. The reaction tends to move in the backward direction if ∆G is large and positive
Answer» E.
Discussion
11.

If ∆G‘° of the reaction A → B is -40kJ/mol under standard conditions then the reactio?#

A. Will never reach equilibrium
B. Will not occur spontaneously
C. Will proceed at a rapid rate
D. Will proceed from left to right spontaneously
Answer» E.
Discussion
12.

What does first law of thermodynamics state?

A. Energy can neither be destroyed nor created
B. Energy cannot be 100 percent efficiently transformed from one type to another
C. All living organisms are composed of cells
D. Input of heat energy increases the rate of movement of atoms and molecules
Answer» B. Energy cannot be 100 percent efficiently transformed from one type to another
Discussion
13.

The relationship between K‘eq and ∆G‘° is$

A. ∆G<sup>‘°</sup> = RTlnK<sup>‘</sup><sub>eq</sub>
B. ∆G<sup>‘°</sup> = -RTK<sup>‘</sup><sub>eq</sub>
C. ∆G<sup>‘°</sup> = RK<sup>‘</sup><sub>eq</sub>
D. ∆G<sup>‘°</sup> = -RK<sup>‘</sup><sub>eq</sub>
Answer» C. ‚Äö√Ñ√∂‚àö‚Ć‚àö√∫G<sup>‚Äö√Ñ√∂‚àö√ë‚àö‚⧬¨¬®‚Äö√†√ª</sup> = RK<sup>‚Äö√Ñ√∂‚àö√ë‚àö‚â§</sup><sub>eq</sub>
Discussion
14.

The study of energy relationships and conversions in biological systems is called as

A. Biophysics
B. Biotechnology
C. Bioenergetics
D. Microbiology
Answer» D. Microbiology
Discussion
15.

Unfolding of regular secondary protein structure causes

A. Large decrease in the entropy of the protein
B. Little increase in the entropy of protein
C. No change in the entropy of the protein
D. Large increase in the entropy of the protein
Answer» E.
Discussion
16.

For a reaction if ∆G° is positive, then$

A. The products will be favored
B. The reactants will be favored
C. The concentration of the reactants and products will be equal
D. All of the reactant will be converted to products
Answer» C. The concentration of the reactants and products will be equal
Discussion
17.

∆G° is defined as the$

A. Residual energy present in the reactants at equilibrium
B. Residual energy present in the products at equilibrium
C. Difference in the residual energy of reactants and products at equilibrium
D. Energy required in converting one mole of reactants to one mole of products
Answer» E.
Discussion
18.

If enthalpy change for a reaction is zero, then ∆G° equals to

A. -T∆S°
B. T∆S°
C. -∆H°
D. lnk<sub>eq</sub>
Answer» B. T‚Äö√Ñ√∂‚àö‚Ć‚àö√∫S¬¨¬®‚Äö√†√ª
Discussion