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6th Chapter

9th class Biology Chapter 6 (English Medium)

Here you can prepare 9th Biology English Medium Chapter 6 Enzymes Test. Click the button for 100% free full practice test.

Matric Part 1/9th Class Biology Chapter 6 MCQ Test With Answer for Chapter 6 Enzymes

Matric Part 1/9th Class Biology Chapter 6 MCQ Test With Answer for Chapter 6 Enzymes

Sr. # Questions Answers Choice
1 The enzyme function between a PH of ..................... .
  • A. 2 to 4
  • B. 6 to 8
  • C. 8 to 10
  • D. 1 to 2
2 When we add more substrate to an already occurring enzymatic reaction and there is no increase in the rate of reaction, what would you predict?
  • A. All active site have been occupied by substrate molecules
  • B. The enzyme molecule have denatured
  • C. More substrate acted as inhibitor
  • D. More substrate has disturbed the pH of the medium
3 metabolism is the some of the ................. proesses.
  • A. Chemical
  • B. Physical
  • C. Both
  • D. None
4 The optimum temperature for human enzyme is between:
  • A. 10-20°C
  • B. 20-35°C
  • C. 35-40°C
  • D. 5-10°C
5 Prosthetic by all enzymes :
  • A. Required by all enzymes
  • B. Loosely attached with enzymes
  • C. Proteins In nature
  • D. Tightly bound to enzyme
6 Minimum energy required to start a chemical reaction is called:
  • A. Potential energy
  • B. Chemical energy
  • C. Activation energy
  • D. All are same
7 Which of the following variable is least likely to affect an enzymes rate of reaction?
  • A. Temperature
  • B. pH
  • C. Carbon dioxide concentration
  • D. Enzyme concentration
8 Lock and key model was proposed by ................. .
  • A. Emil Fisher
  • B. Koshland
  • C. Freitz London
  • D. None
9 All enzymes are composed of:
  • A. Lipids
  • B. Carbohydrates
  • C. Proteins
  • D. Phosphates
10 An enzyme, which breaks down starch is:
  • A. Protease
  • B. Amylase
  • C. Tripsn
  • D. Lipase

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Tri Intels

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