Enzymes And Kinetics

Question: Which of the following refers to pseudo steady state ?
[A].

d(CE)/dt = 0

[B].

d(Cp)/dt = 0

[C].

d(CES)/dt = 0

[D].

d(Cs)/dt = d(CES)/dt

Answer: Option C

Explanation:

No answer description available for this question.

Question: The equation for the rate of product formation for simple enzyme reaction is given by (Where rmax, maximum reaction rate, Cs substrate concentration, Cp product concentration ES, CES enzyme-substrate concentration)
[A].

rp = rmax Cs/(Km+Cs)

[B].

rp= rmax CES/(Km+ CES)

[C].

rp = rmax Cs/(Km+CES)

[D].

rp = rmax Cs/(Km+Cp)

Answer: Option A

Explanation:

No answer description available for this question.

Question: The rate-determining step of Michaelis Menten kinetics is
[A].

the complex formation step

[B].

the complex dissociation step to produce product

[C].

the product formation step

[D].

Both (a)and(c)

Answer: Option B

Explanation:

No answer description available for this question.

Question: Which of these proteases is not a cysteine active site protease?
[A].

Calpain

[B].

Cathepsin D

[C].

Papain

[D].

None of the above

Answer: Option B

Explanation:

No answer description available for this question.

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.