Biology MCQs with answers Page - 38

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Q. Which of the following is the effect of antigen in an ill person -

  • (A) It increases the production of antibiotics
  • (B) It prevents the growth of bacteria
  • (C) It increases the production of W.BC
  • (D) It increases the production of anti-serum against bacteria

A

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Q. In an adult human being, the number of vertebrae is

  • (A) 56
  • (B) 26
  • (C) 33
  • (D) 36

A

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Q. Consider the following pairs
1.Movement of the sunflower head towards sun _____ Phototropism
2.Coiling of a tendril around a support _____ Nyctinasty
3.Downward bending of a leaf _____ Epinasty
4.Closure of sensitive plant leaves on touch _____ Seismonasty
Which of the above pairs are correctly matched? Select the correct answer using the codes given below:

  • (A) 1, 3, and 4
  • (B) 1 and 4
  • (C) 2 and 4
  • (D) Only 1

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Q. Normal adult human male has

  • (A) 18 g of haemoglobin/100 g of blood
  • (B) 10 g of haemoglobin/100 g of blood
  • (C) 14 g of haemoglobin/100 g of blood
  • (D) 24 g of haemoglobin/100 g of blood

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Q. The plant hormone that controls fruit ripening is

  • (A) an auxin
  • (B) a cytokinin
  • (C) ethylene
  • (D) gibberelic acid

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Q. What happens when a rose is illuminated with green light?

  • (A) The petals become warmer than the leaves.
  • (B) The leaves become warmer than the petals.
  • (C) Both petals and leaves remain unaffected.
  • (D) Both petals and leaves become equally warm.

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Q. The smallest flowering plant is

  • (A) Erecta indica
  • (B) Azadaachta indica
  • (C) Wolffia arrhiza
  • (D) Amorphophallus

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Q. Some flowering plants too are unable to photosynthesize and are, therefore, parasitic on other plants. Which of the following are such plants?
1.Beech drops
2.Broomrape
3.Dodder
4.Rafflesia Select the correct answer from the following:

  • (A) 1, 2, and 4
  • (B) 3 and 4
  • (C) 1, 2, 3, and 4
  • (D) 2, 3 and 4

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Q. Purification of blood takes place in

  • (A) Lungs
  • (B) Heart
  • (C) Kidney
  • (D) Liver

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Q. Fully mature human RBCs has

  • (A) A nucleus
  • (B) No nucleus
  • (C) Nucleus may or may not be present
  • (D) None of the above

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