Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

51.

Genetic material found in Human Immunodeficiency Virus (HIV) is

  • Double stranded RNA

  • Single stranded RNA

  • Double stranded DNA

  • Single stranded DNA


52.

Spermatogenesis is under the regulatory influence of

  • ADH

  • FSH

  • LH

  • STH


53.

Which of the following can be controlled by using biopesticides?

  • Insects

  • Diseases

  • Weeds

  • All of these


54.

Which hormone is secreted in a woman if pregnancy has occurred?

  • Estrogen

  • Progesterone

  • Luteinizing hormone

  • Human chorionic gonadotropin


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55.

The product of biotechnology is

  • transgenic crops (GM crops)

  • humulin

  • biofertilizer

  • All of the above


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56.

Menstruation is due to sudden

  • Reduction of FSH

  • Increase of LH

  • Reduction in estrogen and progesterone

  • None of the above


C.

Reduction in estrogen and progesterone

The corpus luteum plays an important role in the preparation of endometrium for the implantation of a fertilized egg by secreting estrogen and progesterone hormones. But if the egg is not fertilized then the corpus luteum begins to degenerate and it stops the production of progesterone and estrogen hormones, which causes shedding of the endometrium lining with menstrual bleeding.


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57.

Which of these is used to control human population?

  • Estrogen + progesterone

  • IUCD and MTP

  • Tubectomy and vasectomy

  •  All of the above


58.

Addiction to alcohol causes

  • Cirrhosis

  • Epilepsy

  • Neurosis

  • Psychosis


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59.

Which has an additional X-chromosome?

  • Turner’s syndrome

  • Klinefelter’s syndrome

  • Super female

  • Down’s syndrome


60.

Origin of life occurred in

  • Precambrian

  • Coenozoic

  • Palaeozoic

  • Mesozoic


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