Biology MCQs with answers Page - 14

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. Cretinism is due to the disorder of the glands

  • (A) Thyroid
  • (B) Parathyroid
  • (C) Thymus
  • (D) Adrenal

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Q. The most important cardiac stimulant is

  • (A) paracetamol
  • (B) cimetidine
  • (C) digoxin
  • (D) penicillin

A

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Q. The most abundant carbohydrate present in blood is

  • (A) cellulose
  • (B) starch
  • (C) lactose
  • (D) glucose

A

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Q. In old age stiffness of joints is due to the

  • (A) enlargement of bones
  • (B) decrease in synovial fluid
  • (C) hardening of bones
  • (D) inefficiency of muscles

A

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Q. The release of the egg/ovum from the ovary is called

  • (A) Secretion
  • (B) Ovulation
  • (C) Fertilisation
  • (D) Menstruation

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Q. Impulses from the pace–maker cause the

  • (A) heart to relax
  • (B) ventricles to contract
  • (C) auricles to contract
  • (D) both the ventricle and auricle to contract

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Q. Yellow color of urine is due to presence of

  • (A) Cholesterol
  • (B) Lymph
  • (C) Urochrome
  • (D) Bile juice

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Q. DNA is made of repeating units called

  • (A) Peptides
  • (B) Aminoacids
  • (C) Ribozomes
  • (D) Nucleotides

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Q. Hemophilia is extremely rare in women because:

  • (A) the female sex hormone, estrogen, protects them
  • (B) they have no y chromosome that bears the gene for hemophilia
  • (C) the female pituitary hormone FSH provides them protection
  • (D) the gene for hemophilia is expressed in women only when such genes are paired which is extremely rare

A

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Q. The retention of urea in the blood in the marine environment, as a means to osmoregulate, is best seen in

  • (A) marine crocodiles
  • (B) bony fishes
  • (C) sharks and rays
  • (D) turtles

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