Entry Test MCQ :: Enzymes
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1. |
Biological molecules (proteins) which catalyze a biochemical reaction and remain unchanged after completion of reaction are called |
A. |
Cofactor |
B. |
Coenzymes |
C. |
Activator |
D. |
Enzymes |
Answer: Option D
Explanation:
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2. |
Which statement about enzyme is incorrect: |
A. |
Some of them consist solely of protein with no non protein part. |
B. |
They catalyze a chemical reaction without being utilized. |
C. |
All enzymes are fibrous Proteins. |
D. |
They without their cofactor are called apoenzyme. |
Answer: Option C
Explanation:
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3. |
In which of the following location enzymes controlling cellular respiration are present? |
A. |
Nucleus |
B. |
Chlorophast |
C. |
Milochondria |
D. |
Ribosome |
Answer: Option C
Explanation:
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4. |
An activated enzyme consisting of polypeptide chain and a cofactor is called: |
A. |
Apoenzyme |
B. |
Holoenzyme |
C. |
Activated enzyme |
D. |
Both b and c |
Answer: Option D
Explanation:
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5. |
Which one forms the raw material for coenzymes? |
A. |
Vitamins |
B. |
Carbohydrates |
C. |
Proteins |
D. |
Metals |
Answer: Option A
Explanation:
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6. |
A cofactor made of inorganic ion which is detachable is called |
A. |
Prosthetic group |
B. |
Coenzyme |
C. |
Activator |
D. |
Cofactor |
Answer: Option C
Explanation:
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7. |
Enzymes _________ the activation energy of a chemical reaction |
A. |
Increases |
B. |
Decreases |
C. |
Does not effect |
D. |
Increases or decreases depending upon individual enzyme |
Answer: Option B
Explanation:
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8. |
A three dimensional dcavity bearing a specific charge by which the enzyme reacts with its substrate is called |
A. |
Active site |
B. |
Binding site |
C. |
Catalytic site |
D. |
Allosteric site |
Answer: Option A
Explanation:
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9. |
Which step causes activation of catalytic site of an enzyme? |
A. |
Change in pH of the surroundings. |
B. |
Formation of Enzyme Susstrate complex. |
C. |
Change in the charge of the active site. |
D. |
Change in temperature |
Answer: Option B
Explanation:
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10. |
Lock and Key model was proposed by |
A. |
Emil Fischer |
B. |
Koshland |
C. |
Robin Williams |
D. |
Rudolph Virchow |
Answer: Option A
Explanation:
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