Biology MCQs with answers Page - 261

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Q. Which organ is primarily responsible for filtering waste products from the blood?

  • (A) Heart
  • (B) Lungs
  • (C) Kidneys
  • (D) Spleen

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Q. Which molecule carries genetic information in most living organisms?

  • (A) ATP
  • (B) DNA
  • (C) Glucose
  • (D) Protein

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Q. Which pigment is primarily responsible for photosynthesis in green plants?

  • (A) Carotene
  • (B) Xanthophyll
  • (C) Chlorophyll
  • (D) Anthocyanin

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Q. Which part of the human brain controls balance and coordination of muscular activities?

  • (A) Cerebrum
  • (B) Cerebellum
  • (C) Medulla oblongata
  • (D) Hypothalamus

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Q. Which blood cells are primarily responsible for fighting infections?

  • (A) Red blood cells
  • (B) Platelets
  • (C) White blood cells
  • (D) Plasma cells

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Q. Which vitamin is mainly synthesized in the skin when exposed to sunlight?

  • (A) Vitamin A
  • (B) Vitamin B12
  • (C) Vitamin C
  • (D) Vitamin D

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Q. Which enzyme present in saliva begins the digestion of starch?

  • (A) Pepsin
  • (B) Trypsin
  • (C) Salivary amylase
  • (D) Lipase

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Q. Which structure controls the entry and exit of substances into a cell?

  • (A) Cell wall
  • (B) Cell membrane
  • (C) Nucleus
  • (D) Cytoplasm

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Q. Which hormone regulates blood glucose levels by promoting the uptake of glucose by cells?

  • (A) Insulin
  • (B) Thyroxine
  • (C) Adrenaline
  • (D) Growth hormone

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Q. Which type of cell division produces four genetically different haploid cells?

  • (A) Mitosis
  • (B) Binary fission
  • (C) Meiosis
  • (D) Budding

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