Biology MCQs with answers Page - 4

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Q. Plant bends towards the source of light on account of the movement of curvature known as

  • (A) geotropism
  • (B) thigmotropism
  • (C) chemotropism
  • (D) phototropism

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Q. Plant have ____ while animals lack it.

  • (A) starch
  • (B) cellulose
  • (C) protein
  • (D) fat

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Q. Osmosis is the flow of solution from higher concentration to a solution of lower concentration through a semi permeable membrane. What is incorrect in this statement?

  • (A) Exact concentration of solution is not given
  • (B) Character of semi permeable membrane is not given
  • (C) The flow of solution is not possible through semi permeable membrane
  • (D) All are incorrect

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Q. Photosynthesis is a process

  • (A) reductive and exergonic
  • (B) reductive and catabolic
  • (C) reductive, endergonic and catabolic
  • (D) reductive, endergonic and anabolic

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Q. On which of the following plants did Gregor Mendal perform his classical experiment?

  • (A) Gram
  • (B) Maize
  • (C) Pea
  • (D) Wheat

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Q. Norepinephrine increases

  • (A) respiration
  • (B) urine production
  • (C) saliva production
  • (D) blood pressure

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Q. Night blindness is cause by lack of which vitamin?

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

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Q. Monocot root differs from dicot root in having

  • (A) open vascular bundles
  • (B) scattered vascular bundles
  • (C) well developed pith
  • (D) radially arranged vascular bundles

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Q. Radioactivity is a phenomenon of the spontaneous emission of

  • (A) protons (alpha particles)
  • (B) electrons (beta particles)
  • (C) gamma rays (short wave electromagnetic waves)
  • (D) All of the above

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Q. Organic Substances which, in very small amounts, control growth and development called

  • (A) vitamins
  • (B) hormones
  • (C) enzymes
  • (D) None of the above

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