Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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21.

Pellagra is caused due to deficiency of the vitamin

  • thiamine

  • niacinn

  • pyridoxin

  • biotin


B.

niacinn

Pellagra is a disease caused by low levels of niacin, also known as vitamin B-3. It's marked by dementia, diarrhea, and dermatitis, also known as “the three Ds”. If left untreated, pellagra can be fatal.


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22.

The specific region of hypothalamus, responsible for physiological sweat secretion, is

  • para-ventricular nucleus

  • supra-optic nucleus

  • median eminence

  • pars distalis


23.

The duration of cardiac cycle is

  • 0.8 s

  • 0.8 µs

  • 0.08 s

  • 0.008 s


24.

The resolving power of a compound microscope will increase with

  • decrease in wavelength of light and increase in numerical aperture

  • increase in wavelength of light and decrease in numerical aperture

  • increase in both wavelength of light and numerical aperture 

  • decrease in both wavelength of light and numerical aperture


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25.

Osteomalacia is a disease caused by the deficiency of

  • calciferol

  • tocopherol

  • retinol

  • phylloquinone


26.

Cells in G0 phase of cell cycle

  • exit cell cycle

  • enter cell cycle

  • suspend cell cycle

  • terminate cell cycle


27.

Choose the correct non-protein amino acid

  • hydroxyproline

  • hydroxylysine

  • cystine

  • y-amino butyric acid


28.

The major site of protein breakdown to form free amino acids is in the

  • kidney

  • spleen

  • liver

  • bone-marrow


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29.

Collagen is a

  • phosphoprotein

  • globulin

  • derived protein

  • scleroprotein


30.

The "Repeating Unit" of glycogen is

  • fructose

  • mannose

  • glucose

  • galactose


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