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1676. Which of the following makes skin layer impervious to water ?
A. Collagen
B. Melanin
C. Keratin
D. Chitin
Explanation:
1677. If one chews an unsweetened chapati for a short time,a distinctly sweetish taste becomes noticeable because
A. carbohydrate is converted into sugar in the mouth.
B. protein is converted into sugar in the mouth.
C. fat is converted into sugar in the mouth.
D. vitamins are converted into sugar in the mouth.
Explanation:
1678. The saliva helps in the digestion of
A. proteins
B. fats
C. fibres
D. starch
Explanation:
1679. Red blood corpuscles are formed in
A. Liver
B. Small intestine
C. Kidneys
D. Bone marrow
Explanation:
1680. Scratching eases itching because
A. it kills germs.
B. it suppresses the production of enzymes which cause itching.
C. it removes the outer dust in the skin.
D. it stimulates certain nerves which direct the brain to increase the production of antihistaminic chemicals.
Explanation:
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