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 Minimum energy required to start a chemical reaction is called:
  • A. Potential energy
  • B. Chemical energy
  • C. Activation energy
  • D. All are same
2 The building units of enzymes are:
  • A. Fatty acids
  • B. Glycerol
  • C. Nucleic acid
  • D. Amino acid
3 When an enzyme is no longer able to work, it is said to be:
  • A. Catalyzed
  • B. Dead
  • C. Cofactored
  • D. Denatured
4 An enzyme, which breaks down starch is:
  • A. Protease
  • B. Amylase
  • C. Tripsn
  • D. Lipase
5 Vitamin which acts as co-enzyme is:
  • A. Vitamin A
  • B. Vitamin K
  • C. Riboflavin
  • D. All of these
6 To waht category of molecules do enzymes belong?
  • A. Carbohydrates
  • B. Lipids
  • C. Nucleic acids
  • D. Proteins
7 Induced Fit model was proposed by:
  • A. Emil Fischer
  • B. Melcher
  • C. Koshland
  • D. Saugeo
8 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 sites have been occupied by substrate molecules
  • B. The enzyme molecules have denatured
  • C. More substrate acted as inhibitor
  • D. More substrate has disturbed the pH of the medium
9 Almost all enzymes are:
  • A. Carbohydrates
  • B. Fatty acids
  • C. Proteins
  • D. Vitamins
10 To what category of molecules do enzymes belong?
  • A. Carbohydrates
  • B. Lipids
  • C. Nucleic acids
  • D. Proteins

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