AFNS Biology - Enzymes AFNS MCQs

#25
Feedback inhibition regulates:

A) Metabolic pathways

B) Gravity

C) Photosynthesis only in plants

D) Cell division only

Answer: A

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#26
Substrate concentration increase initially:

A) Increases reaction rate

B) Always stops enzyme

C) Destroys enzyme always

D) Has no effect

Answer: A

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Comments:

#27
At very high substrate, rate plateaus because:

A) Enzyme saturated

B) Substrate disappears

C) Temperature zero

D) pH infinite

Answer: A

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#28
Salivary amylase acts in:

A) Mouth

B) Stomach

C) Liver

D) Large intestine

Answer: A

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Comments:

#29
Renin is enzyme in:

A) Stomach

B) Small intestine

C) Saliva

D) Blood only

Answer: A

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Comments:

#30
Zymogens are:

A) Inactive enzyme precursors

B) Active enzymes only

C) Lipids

D) Sugars

Answer: A

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Comments:

#31
Enzymes are not consumed in reaction because they:

A) Regenerate after reaction

B) Become substrate

C) Become product permanently

D) Disappear

Answer: A

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AFNS â€” AFNS Biology

#25
Feedback inhibition regulates:

A) Metabolic pathways

B) Gravity

C) Photosynthesis only in plants

D) Cell division only

Comments:

#26
Substrate concentration increase initially:

A) Increases reaction rate

B) Always stops enzyme

C) Destroys enzyme always

D) Has no effect

Comments:

#27
At very high substrate, rate plateaus because:

A) Enzyme saturated

B) Substrate disappears

C) Temperature zero

D) pH infinite

Comments:

#28
Salivary amylase acts in:

A) Mouth

B) Stomach

C) Liver

D) Large intestine

Comments:

#29
Renin is enzyme in:

A) Stomach

B) Small intestine

C) Saliva

D) Blood only

Comments:

#30
Zymogens are:

A) Inactive enzyme precursors

B) Active enzymes only

C) Lipids

D) Sugars

Comments:

#31
Enzymes are not consumed in reaction because they:

A) Regenerate after reaction

B) Become substrate

C) Become product permanently

D) Disappear

Comments:

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AFNS â€” AFNS Biology

#25 Feedback inhibition regulates:

A) Metabolic pathways B) Gravity C) Photosynthesis only in plants D) Cell division only

Comments:

#26 Substrate concentration increase initially:

A) Increases reaction rate B) Always stops enzyme C) Destroys enzyme always D) Has no effect

Comments:

#27 At very high substrate, rate plateaus because:

A) Enzyme saturated B) Substrate disappears C) Temperature zero D) pH infinite

Comments:

#28 Salivary amylase acts in:

A) Mouth B) Stomach C) Liver D) Large intestine

Comments:

#29 Renin is enzyme in:

A) Stomach B) Small intestine C) Saliva D) Blood only

Comments:

#30 Zymogens are:

A) Inactive enzyme precursors B) Active enzymes only C) Lipids D) Sugars

Comments:

#31 Enzymes are not consumed in reaction because they:

A) Regenerate after reaction B) Become substrate C) Become product permanently D) Disappear

Comments:

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#25
Feedback inhibition regulates:

A) Metabolic pathways

B) Gravity

C) Photosynthesis only in plants

D) Cell division only

#26
Substrate concentration increase initially:

A) Increases reaction rate

B) Always stops enzyme

C) Destroys enzyme always

D) Has no effect

#27
At very high substrate, rate plateaus because:

A) Enzyme saturated

B) Substrate disappears

C) Temperature zero

D) pH infinite

#28
Salivary amylase acts in:

A) Mouth

B) Stomach

C) Liver

D) Large intestine

#29
Renin is enzyme in:

A) Stomach

B) Small intestine

C) Saliva

D) Blood only

#30
Zymogens are:

A) Inactive enzyme precursors

B) Active enzymes only

C) Lipids

D) Sugars

#31
Enzymes are not consumed in reaction because they:

A) Regenerate after reaction

B) Become substrate

C) Become product permanently

D) Disappear