10th Class Board Examination - Biological Science MCQs

Instructions: Choose the correct option for each question. Each question carries 1 mark.

1. Which of the following is the basic unit of life?

  • (a) Tissue
  • (b) Cell
  • (c) Organ
  • (d) Organism

2. The process by which plants make their own food is called:

  • (a) Respiration
  • (b) Transpiration
  • (c) Photosynthesis
  • (d) Excretion

3. Which gas is released during photosynthesis?

  • (a) Carbon dioxide
  • (b) Nitrogen
  • (c) Oxygen
  • (d) Hydrogen

4. The organ responsible for pumping blood in the human body is:

  • (a) Liver
  • (b) Kidney
  • (c) Heart
  • (d) Lungs

5. Which of the following is NOT a characteristic of living organisms?

  • (a) Growth
  • (b) Reproduction
  • (c) Respiration
  • (d) Rusting

6. The process of breakdown of glucose in the absence of oxygen is called:

  • (a) Aerobic respiration
  • (b) Anaerobic respiration
  • (c) Photosynthesis
  • (d) Transpiration

7. Which hormone is responsible for controlling blood sugar levels?

  • (a) Thyroxine
  • (b) Insulin
  • (c) Adrenaline
  • (d) Growth hormone

8. The functional unit of the kidney is:

  • (a) Neuron
  • (b) Nephron
  • (c) Alveoli
  • (d) Villus

9. In which part of the flower does fertilization take place?

  • (a) Anther
  • (b) Stigma
  • (c) Ovary
  • (d) Petal

10. According to Mendel's law, which trait is expressed in the F1 generation of a monohybrid cross?

  • (a) Recessive trait only
  • (b) Dominant trait only
  • (c) Both dominant and recessive traits
  • (d) Neither dominant nor recessive traits

ANSWER KEY:

  1. (b) Cell
  2. (c) Photosynthesis
  3. (c) Oxygen
  4. (c) Heart
  5. (d) Rusting
  6. (b) Anaerobic respiration
  7. (b) Insulin
  8. (b) Nephron
  9. (c) Ovary
  10. (b) Dominant trait only

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