Enzymes MCQs with answers Page - 2

You will find multiple-choice questions (MCQs) related to #Enzymes here. Go through these questions to prepare effectively for your upcoming exams and interviews.

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Q. Enzymes work best at which temperature in the human body?

  • (A) 0°C
  • (B) 25°C
  • (C) 37°C
  • (D) 50°C

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Q. The pH at which an enzyme shows maximum activity is called its:

  • (A) Activation pH
  • (B) Optimal pH
  • (C) Basic pH
  • (D) Neutral pH

A

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Q. What happens to enzyme activity when the temperature is too low?

  • (A) Enzyme is denatured
  • (B) Activity slows down
  • (C) Enzyme is destroyed
  • (D) Activity increases rapidly

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Q. Which enzyme is present in human saliva?

  • (A) Amylase
  • (B) Lipase
  • (C) Pepsin
  • (D) Trypsin

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Q. Which enzyme helps in breaking down hydrogen peroxide into water and oxygen?

  • (A) Amylase
  • (B) Catalase
  • (C) Pepsin
  • (D) Lipase

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Q. Which enzyme digests proteins in the stomach?

  • (A) Pepsin
  • (B) Amylase
  • (C) Lipase
  • (D) Maltase

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Q. Enzymes are specific because:

  • (A) They can bind to many substrates
  • (B) Their active site fits only one substrate
  • (C) They are made of lipids
  • (D) They are non-biological

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Q. The substance on which an enzyme acts is called:

  • (A) Product
  • (B) Reactant
  • (C) Substrate
  • (D) Activator

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Q. Which of the following is an example of a coenzyme?

  • (A) ATP
  • (B) NAD+
  • (C) Glucose
  • (D) DNA

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Q. Enzyme activity can be inhibited by:

  • (A) Excess substrate
  • (B) High temperature or extreme pH
  • (C) Low enzyme concentration only
  • (D) Presence of water
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