Biology Test for Class X

Class 10 Biology – Unit Test

Total Time: 1 Hour    Maximum Marks: 40

Section A: MCQs – Attempt online (20 × 1 = 20 marks)
Section B: Subjective – Write answers in your copy (20 marks)

Section A – MCQs

Correct Answers:

1. Cerebellum
2. Gas exchange
3. Auxin
4. Fertilisation
5. Dominant
6. Nephron
7. RBC
8. Amoeba
9. Chloroplast
10. Artery
11. Nucleus
12. Water
13. Survival
14. 23
15. Producers
16. COVID-19
17. Leaves
18. Spinal cord
19. Genetics
20. Food waste

Section B – Subjective (Write in Copy)

1. Life Processes: Explain how respiration and photosynthesis are interdependent processes. (4)
2. Case-Based: A student touched a hot object and immediately withdrew the hand. Explain the biological pathway involved and name the parts. (4)
3. Competency-Based: Why is sexual reproduction considered important for evolution? Explain with two reasons. (4)
4. Heredity: State Mendel’s law of dominance. Explain with a suitable cross. (4)
5. Environmental Biology: “Non-biodegradable waste is a threat to ecosystem stability.” Justify the statement. (4)

Prepared as per CBSE Class X Biology (2025–26) | Competency-Based Assessment

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Class 10 Biology – Unit Test

Total Time: 1 Hour    Maximum Marks: 40

Section A: MCQs – Attempt online (20 × 1 = 20 marks)
Section B: Subjective – Write answers in your copy (20 marks)

Section A – MCQs

1. Which part of the brain maintains balance?

Cerebrum Medulla Cerebellum Hypothalamus

2. Stomata help in:

Transport Gas exchange Reproduction Support

3. Which hormone controls plant growth?

Insulin Thyroxine Auxin Adrenaline

4. Fusion of gametes is called:

Pollination Fertilisation Germination Regeneration

5. Trait expressed in F₁ generation is:

Recessive Dominant Both None

Correct Answers:

1. Cerebellum
2. Gas exchange
3. Auxin
4. Fertilisation
5. Dominant

Section B – Subjective Questions

Instruction: Write answers neatly in your copy.

1. Explain the process of nutrition in human beings. (4 marks)
2. What is reflex action? Describe the reflex arc with diagram. (4 marks)
3. Differentiate between asexual and sexual reproduction. (4 marks)
4. State Mendel’s law of dominance with an example. (4 marks)
5. Why are biodegradable wastes preferred over non-biodegradable wastes? (4 marks)

Prepared as per CBSE Class X Biology (2025–26) | Online + Written Assessment