Metabolism is defined as:

All chemical reactions occurring in an organism to sustain life

Movement of substances across cells

Breaking complex molecules into simpler ones

Building complex molecules from simpler ones

Class 9 Biology · Chapter 7 · Test 5

Enzymes Full Test

25 MCQs covering metabolism, enzyme characteristics, cofactors, industrial applications, enzyme action, temperature, pH, substrate concentration, and enzyme inhibition.

MCQs

25 questions · 20 min · 25 marks

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Sample questions

The first 5 of 25. Try each one, then tap to see the answer.

Question 1
Metabolism is defined as:
- AAll chemical reactions occurring in an organism to sustain life
- BOnly the breakdown of proteins
- COnly the formation of glucose
- DMovement of substances across cells
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Answer: A
The textbook defines metabolism as all chemical reactions occurring in an organism to sustain life.
Question 2
Catabolism involves:
- ABuilding complex molecules from simpler ones
- BBreaking complex molecules into simpler ones
- CProducing enzymes only
- DStoring genetic information
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Answer: B
Catabolism is the breakdown of complex molecules into simpler ones and releases energy.
Question 3
Anabolism involves:
- ABreaking complex molecules
- BBuilding complex molecules from simpler ones
- CBreaking down fats only
- DDestroying enzymes
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Answer: B
Anabolism builds complex molecules from simpler molecules and consumes energy.
Question 4
During cellular respiration, glucose is broken down into:
- ACO2 and H2O
- BProteins and lipids
- CAmino acids and glycerol
- DStarch and cellulose
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Answer: A
The textbook gives cellular respiration as an example of catabolism in which glucose is broken into CO2 and H2O.
Question 5
Which process is an example of anabolism?
- ALipolysis
- BCellular respiration
- CPhotosynthesis
- DProtein breakdown
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Answer: C
Photosynthesis is an anabolic process because simpler molecules are joined to form glucose.

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