Biology MCQs with answers Page - 99

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Q. Bt seed is related with

  • (A) Rice
  • (B) Wheat
  • (C) Oil seeds
  • (D) Cotton

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Q. Lichen is considered to be a symbiotic association of two living organisms. Which organisms are involved in it?

  • (A) Fungi and bryophytes
  • (B) Algae and fungi
  • (C) Algae and bacteria
  • (D) Algae and bryophytes

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Q. To reduce tooth decay most toothpastes contain a

  • (A) Bromide
  • (B) Chloride
  • (C) Iodide
  • (D) Fluoride

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Q. In human beings, normally in which one of the following parts, does the sperm fertilise the ovum?

  • (A) Upper part of uterus
  • (B) Cervix
  • (C) Fallopian tube
  • (D) Lower part of uterus

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Q. Which among the given organism possesses characteristics of a plant & an animal -

  • (A) Euglena
  • (B) Mycoplasma
  • (C) Chlorella
  • (D) Paramecium

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Q. In our body, antibodies are formed against pathogens in

  • (A) brain by macrophages
  • (B) blood by platelets
  • (C) thymus by lymphocytes
  • (D) liver by RBC

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Q. Adherent mucoid alkaline substance covering the inner lining of stomach is to

  • (A) prevent the action of pepsin of mucosa
  • (B) digest starch
  • (C) act against bacteria
  • (D) prevent viral infection

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Q. The average life span of red blood corpuscles is about

  • (A) 100 - 120 days
  • (B) 100 - 200 days
  • (C) 150 - 200 days
  • (D) 160 - 180 days

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Q. A high surface area to volume ratio in cells is important because it

  • (A) Enables efficient transfer of wastes, nutrients and gases across the cell membrane
  • (B) Allows many antigens on the surface for identification of self and non-self
  • (C) Prevents overproduction of cell proteins due to structural limitations
  • (D) Provides for better structural support to cope with external physical pressure

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Q. What happens to a person Who among the following receives the wrong type of blood -

  • (A) All the arteries dialates
  • (B) The RBCs agglutinate
  • (C) All the arteries constrict
  • (D) The spleen & lymphnodes deteriorate

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