Multiple Choice Questions

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Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?

  • Kyoto Protocol

  • Gothenburg Protocol

  • Geneva Protocol

  • Montreal Protocol


D.

Montreal Protocol

To control the deleterious effect of the stratospheric ozone depletion an international treaty was signed at Montreal, Canada in 1987. It is popularly known as Montreal protocol.


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Which of the following is the most important cause for animals and plants being driven to extinction?

  • Drought and floods

  • Economic exploitation

  • Alien species invasion

  • Habitat loss and fragmentation


Select the correct sequence for transport of sperm cells in male reproductive system.

  • Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → urethra → urethral meatus

  • Seminiferous tubules → Vasa efferentia → epididymis → Inguinal canal → Urethra

  • Testis → Epididymis → vasa efferentia → vas deferens → ejaculatory duct → inguinal canal → urethra → Urethral meatus

  • Testis → Epididymis → Vasa efferentia → Rete testis → Inguinal canal → Urethra


Persistent nucellus in the seed is known as

  • Perisperm

  • Hilum

  • Tegmen

  • Chalaza


What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm?

  • Moist surface of midgut

  • Alkaline pH of gut

  • Acidic pH of stomach

  • Body temperature


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Which one of the following equipments is essentially required for growing microbes on a large scale, for industrial production of enzymes?

  • Sludge digester

  • Industrial oven

  • Bioreactor

  • BOD incubator


Which of the following is true for Golden rice?

  • It is pest resistant, with a gene from Bacillus thuringiensis

  • It is drought tolerant, developed using Agrobacterium vector

  • It has yellow grains, because of a gene introduced from a primitive variety of rice

  • It is Vitamin A enriched, with a gene from daffodil


What is the genetic disorder in which an individual has an overall masculine development gynaecomastia, and is sterile ?

  • Klinefelter's syndrome

  • Edward syndrome

  • Down's syndrome

  • Turner's syndrome


Placentation in which ovules develop on the inner wall of the ovary or in peripheral part, is

  • Axile

  • Parietal

  • Free central

  • Basal


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Purines found both in DNA and RNA are

  • Adenine and guanine

  • Guanine and cytosine

  • Cytosine and thymine

  • Adenine and thymine