Multiple Choice Questions

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In plant tissue culture, the callus tissues can be regenerated into complete plantlets primarily by altering the concentration of

  • sugars

  • vitamins

  • amino acids

  • hormones


D.

hormones

In plant tissue culture, the callus tissues can be regenerated into complete plantlets primarily by altering the concentration of hormones. Infact, shoot and root regenerations are, generally controlled by auxin-cytokinin balance. Usually an excess of auxins promotes root regenration while cytokinins promote shoot regeneration.


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Xenogamy is essentially a type of

  • cleistogamy

  • allogamy

  • autogamy

  • homogamy


Which pairs of the following diseases are caused by two genes located on human X-chromosomes?

  • Colour blindness and phenylketonuria

  • Colour blindness and haemophilia

  • Colour blindness and albinism

  • Colour blindness and hypertrichosis


Mammals have originated from which of the following

  • Pisces

  • Amphibia

  • Reptilia

  • Aves


Which one of. the following animals possesses giant chromosome?

  • Drosophila

  • Mouse

  • Pigeon

  • Elephant


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The volume of 'Anatomical Dead Space' air is normally

  • 230 mL

  • 210 mL

  • 190 m

  • 150 mL


Presence of which of the following hormone in the urine confirms pregnancy?

  • Progesterone

  • Oestrogen

  • Human chorionic gonadotropin

  • Prolactin


Basic principle of developing transgenic plants and animals is to introduce the gene of interest into the nucleus of

  • somatic cell

  • vegetative cell

  • germ cell

  • body cell


Which one of the following triplet codon is known as initiation codon?

  • UUU

  • UAA

  • AUG

  • UGA


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If you want to develop hybrid seeds within a bisexual flower, the following part needs to be removed from the same flower

  • stigma

  • ovary

  • anther

  • oviduct