Biology MCQs with answers Page - 257

Here, you will find a collection of MCQ questions on Biology. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Which hormone controls water balance?

  • (A) ADH
  • (B) Insulin
  • (C) Thyroxine
  • (D) Estrogen

A

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Q. Assertion (A): Biodiversity increases ecosystem stability.
Reason (R): More species provide resilience.

  • (A) Both A and R are true and R is correct
  • (B) Both A and R are true but R is not correct
  • (C) A is true but R is false
  • (D) A is false but R is true

A

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Q. Which is the basic structural and functional unit of life?

  • (A) Tissue
  • (B) Organ
  • (C) Cell
  • (D) Organ system

A

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Q. Which organelle is responsible for protein synthesis?

  • (A) Ribosome
  • (B) Lysosome
  • (C) Mitochondria
  • (D) Vacuole

A

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Q. Which organelle is known as the suicide bag of the cell?

  • (A) Ribosome
  • (B) Lysosome
  • (C) Nucleus
  • (D) Chloroplast

A

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Q. Which cell organelle contains the genetic material and controls most cellular activities?

  • (A) Nucleus
  • (B) Golgi apparatus
  • (C) Vacuole
  • (D) Ribosome

A

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Q. Which process involves the movement of water through a selectively permeable membrane?

  • (A) Diffusion
  • (B) Osmosis
  • (C) Respiration
  • (D) Transpiration

A

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Q. Which process allows green plants to prepare food using sunlight?

  • (A) Respiration
  • (B) Transpiration
  • (C) Photosynthesis
  • (D) Fermentation

A

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Q. Which gas is required by plants for photosynthesis?

  • (A) Oxygen
  • (B) Carbon dioxide
  • (C) Nitrogen
  • (D) Hydrogen

A

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Q. Which part of the plant contains stomata that regulate gas exchange?

  • (A) Leaf
  • (B) Root
  • (C) Seed
  • (D) Fruit