QuizMaster

Question: If a reaction occurs in the absence of inhibitor with rate ν0 and in the presence of inhibitor with rate νi, the degree of inhibition is defined as
[A].

(ν0 – νi)/ν0

[B].

(ν0 + νi)/ν0

[C].

(ν0νi)/ν0

[D].

(ν0-νi)/νi

Answer: Option A

Explanation:

No answer description available for this question.

Question: The effect of non-competitive inhibition on a Lineweaver-Burk Plot is that
[A].

it can move the entire curve to the right

[B].

it can change the y-intercept

[C].

it can change the x-intercept

[D].

all of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Which of the following statement(s) regarding enzymes, is/are false?
[A].

Enzymes are always proteins that function as catalysts

[B].

Enzymes provide activation energy for reactions

[C].

Enzyme activity can be regulated

[D].

Enzymes may be used many times for a specific reaction

Answer: Option B

Explanation:

No answer description available for this question.

Question: In competitive inhibition a factor is obtained from the measurement of
[A].

Vmax

[B].

KM

[C].

Y-intercept in Lineweaver-Burk Plot

[D].

None of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: In a Lineweaver-Burk Plot, competitive inhibitor shows which of the following effect?
[A].

It moves the entire curve to right

[B].

It moves the entire curve to left

[C].

It changes the x-intercept

[D].

It has no effect on the slope

Answer: Option C

Explanation:

No answer description available for this question.

Question: An allosteric inhibitor of an enzyme usually
[A].

participates in feedback regulation

[B].

denatures the enzyme

[C].

is a hydrophobic compound

[D].

causes the enzyme to work faster

Answer: Option A

Explanation:

No answer description available for this question.

Question: Which of the following common drugs is not a specific enzyme inhibitor?
[A].

Iodine

[B].

Methotrexate

[C].

Sulfbnilamide

[D].

Penicillin

Answer: Option A

Explanation:

No answer description available for this question.

Question: Non-competitive inhibitor of an enzyme catalyzed reaction
[A].

decreases Vmax

[B].

binds to Michaelis complex (ES)

[C].

both (a) and (b)

[D].

can actually increase reaction velocity in rare cases

Answer: Option C

Explanation:

No answer description available for this question.

Question: Linear inhibition is sometimes called as
[A].

complete inhibition

[B].

incomplete inhibtion

[C].

partial inhibition

[D].

mixed inhibition

Answer: Option A

Explanation:

No answer description available for this question.