Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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61.

Schizogony occurs in 

  • RBC of human

  • intestine of parasite

  • liver of human

  • liver of parasite


C.

liver of human

Schizogony is a stage in asexual reproduction of Plasmodium (malarial parasite) in which schizont is formed. From the human blood sporozoites enter the liver cells. It grows in size to become a rounded schizont called cryptozoite and further divides to form cryptomerozoites. The host liver cells rupture to liberate the cryptomerozoites into the liver sinusoids.


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62.

Gases found in primitive atmosphere are

  • CH4, NH3, H2, H2O (vapour form)

  • CH4, NH3, CO2, H2O

  • CH4, H2O, CO2

  • CH4, O2, CO2


63.

Sertoli cells are found in testis. These cells are

  • nurse cells

  • reproductive cells

  • receptor cells

  • None of the above


64.

Species can be identified on the basis of

  • interbreed

  • species diversity

  • reproductive isolation

  • None of the above


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65.

Covered smut of barley is caused by

  • Ustilago hordei

  • Tilletia caries

  • Ustilago nudo

  • Colletotrichum falcatum


66.

Growth of pollen tube towards embryo sac is

  • geotropism

  • thigmotaxis

  • chemotaxis

  • All of these


67.

Ozone depletion in stratosphere would result in 

  • forest fires

  • global warming

  • skin cancer incidence

  • None of the above


68.

Which of the following is a test cross?

  • Tt ×tt

  • TT ×tt

  • Tt ×Tt

  • tt ×tt


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69.

1 : 2 : 1 phenotypic and genotypic ratio is found in

  • complementary genes

  • blending inheritance

  • multiple alleles

  • pseudo alleles


70.

The back bone of RNA consists of which of the following sugar?

  • Deoxyribose

  • Ribose

  • Sucrose

  • Maltose


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