Biology MCQs with answers Page - 25

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. The presence of air bubble in blood stream is dangerous to life as

  • (A) The pressure of blood increases manifold
  • (B) The flow of blood is obstructed
  • (C) Air combines with blood forming a complex
  • (D) The flow of blood increases manifold

A

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Q. Which of the following does not occur during Mitosis?

  • (A) condensation of the chromosomes
  • (B) breakdown of the nuclear membrane
  • (C) replication of the DNA
  • (D) spindle formation

A

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Q. During fermentation of sugar, the chief compound always formed is

  • (A) ethylene
  • (B) ethyl alcohol
  • (C) methyl alcohol
  • (D) acetic acid

A

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Q. The catalytic power of enzymes is due to

  • (A) their ability to lower the activation energy of the reaction
  • (B) their limited solubility in water and other solvents
  • (C) their high molecular weight
  • (D) the presence of amino acids in their structures

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Q. The substance present in good amounts in the sea and administered in certain deficiency diseases is

  • (A) sodium chloride
  • (B) fluorine
  • (C) iodine
  • (D) iron

A

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Q. A main function of the autonomic nervous system, which consists of the sympathetic and parasympathetic divisions, is to

  • (A) control the activity of a variety of secretory cells throughout the body
  • (B) control involuntary reflexes such as the knee-jerk response
  • (C) act as an inhibitory system for skeletal muscle
  • (D) communicate between the two halves of the brain

A

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Q. The biomolecules that contribute to the genetic material of cells are

  • (A) proteins
  • (B) nucleic acids
  • (C) carbohydrates
  • (D) lipids

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Q. When temperature difference between liquid & its surroundings is doubled, the rate of loss of heat will

  • (A) double
  • (B) remain same
  • (C) four times
  • (D) three times

A

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Q. Scarification of seeds is done for removing

  • (A) Germination inhibitors
  • (B) Dormancy
  • (C) Growth
  • (D) Embryo

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Q. Birds usually have a single

  • (A) Ovary
  • (B) Testis
  • (C) Lung
  • (D) Kidney

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