QuizMaster

Question: Which graphical method is used to determine an enzyme degree of cooperativity?
[A].

Hill plot

[B].

Koshland curve

[C].

Michaelis-Menten hyperbola

[D].

Can not be determined

Answer: Option A

Explanation:

No answer description available for this question.

Question: Which of these enzymes contains a Zinc (Zn) ion?
[A].

Carboxypeptidase A

[B].

Phosphorylase B kinase

[C].

Tyrosine hydroxylase

[D].

Phosphodiesterase

Answer: Option A

Explanation:

No answer description available for this question.

Question: Which category of enzymes belongs to class two in the international classification?
[A].

Hydrolases

[B].

Ligases

[C].

Transferases

[D].

Isomerase

Answer: Option C

Explanation:

No answer description available for this question.

Question: When an enzyme is functioning at Vmax, the rate of the reaction is limited by
[A].

the number of collisions between enzyme and substrate

[B].

the number of substrate molecules in the reaction

[C].

the concentration of the substrate

[D].

the rate at which the enzyme can convert substrate to product

Answer: Option D

Explanation:

No answer description available for this question.

Question: The ratio of the amount of a protein present in a sample, which is used as a measure of purification, is known as
[A].

specific activity

[B].

relative activity

[C].

purity ratio

[D].

all of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Which category of enzymes belongs to class 5 in the international classification?
[A].

Hydrolases

[B].

Isomerases

[C].

Oxido-reductases

[D].

Cyclase

Answer: Option B

Explanation:

No answer description available for this question.

Question: The conformational change in an enzyme after the substrate is bound that allows the chemical reaction to proceed, can be explained by
[A].

induced fit

[B].

transition

[C].

fit and fine

[D].

Pasteur

Answer: Option A

Explanation:

No answer description available for this question.

Question: Which of the following activity is possible by transferases?
[A].

Transfer of methyl groups

[B].

Transfer of glycosyl group

[C].

Both (a) and (b)

[D].

None of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: When [S] = 0.1 *KM, the velocity of an enzyme catalyzed reaction is about:
[A].

0.1 * Vmax

[B].

0.3 * Vmax

[C].

0.5 * Vmax

[D].

0.7 * Vmax

Answer: Option A

Explanation:

No answer description available for this question.

Question: The initial velocity, V0, of an enzyme catalyzed reaction reaches Vmax as
[A].

[S] = KM

[B].

[S] = 10 * KM

[C].

1/[S] = 1/KM

[D].

1/[S] → 0

Answer: Option D

Explanation:

No answer description available for this question.