MCQs

1. Growth in living organisms is defined as
A) Change in colour
B) Increase in cell number or mass
C) Movement from one place to another
D) Respiration

2. Which characteristic is not considered an all-inclusive defining feature of living organisms?
A) Metabolism
B) Cellular organisation
C) Reproduction
D) Consciousness

3. Which of the following does not reproduce?
A) Bacteria
B) Amoeba
C) Mule
D) Hydra

4. The sum total of all chemical reactions occurring in the body is called
A) Respiration
B) Metabolism
C) Growth
D) Nutrition

5. Metabolism is absent in
A) Plants
B) Animals
C) Fungi
D) Non-living objects

6. The defining feature of life forms is
A) Reproduction
B) Cellular organisation
C) Movement
D) Growth

7. Metabolic reactions performed in a test tube are called
A) Dead reactions
B) Living reactions
C) Artificial reactions
D) Non-biological reactions

8. Ability to sense and respond to environmental changes is known as
A) Respiration
B) Consciousness
C) Growth
D) Digestion

9. Photoperiod affects
A) Digestion B) Respiration C) Reproduction in seasonal breeders D) Excretion
10. Human beings are unique because they possess
A) Movement
B) Nutrition
C) Self-consciousness
D) Reproduction

11. Which of the following is the most defining property of living organisms?
A) Growth
B) Reproduction
C) Consciousness
D) Locomotion

12. Which statement is correct?
A) All living organisms reproduce
B) All reproducing things are living
C) Reproduction alone cannot define life
D) Non-living things show metabolism

13. Metabolic reactions in vitro are
A) Living organisms
B) Non-living reactions
C) Living reactions but not living things
D) Absent outside cells

14. Which of the following is common to all living organisms without exception?
A) Reproduction
B) Growth
C) Metabolism
D) Locomotion