Multiple Choice Questions

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Which one of the following bases is not present in DNA?

  • Quinoline

  • Adenine

  • Cytosine

  • Cytosine


A.

Quinoline

Quinoline is an alkaloid, it is not present in DNA. DNA  has four nitrogen bases in adenine, guanine, cytosine and  thymine

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Which of the following compounds can be detected by Molisch’s test?

  • Nitro compounds

  • Sugars

  • Amines

  • Amines

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Synthesis of each molecule of glucose in photosynthesis involves

  • 18 molecules of ATP

  • 10 molecules of ATP

  • 8 molecules of ATP

  • 8 molecules of ATP

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Which of the following compounds will behave as a reducing sugar in an aqueous KOH solution?

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The presence or absence of hydroxy group on which carbon atom of sugar differentiates RNA and DNA.

  • 1st

  • 2nd

  • 3rd

  • 3rd

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Biuret test is not given by 

  • proteins

  • carbohydrates

  • polypeptides

  • polypeptides

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One mole of stachyose on hydrolysis yields

  • 1 mole of glucose+ 1 mole of fructose+ 2 mole of galactose

  • 2 mole of glucose + 1 mole of fructose + 1 mole of galactose

  • 1 mole of glucose+ 2 mole of fructose+ 1 mole of galactose

  • 2 mole of glucose+ 2 mole of fructose


Deficiency of which vitamin causes degeneration of spinal cord?

  • E

  • K

  • B12

  • A


The absolute configuration of

is:

  • (2S, 3R)

  • (2S, 3S)

  • (2R, 3R)

  • (2R, 3R)

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Which of the vitamins given below is water soluble?

  • Vitamin C

  • Vitamin D

  • Vitamin E

  • Vitamin E

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