What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?

(a) Gastric juice will be deficient in chymosin
(b) Gastric juice will be deficient in pepsinogen
(c) In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin
(d) Enterokinase will not be released from the duodenal mucosa and so trypsinogcn is not converted to trypsin

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Which one of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product?
(a) Duodenum :TriglyceridesTrypsinMonoglycerides
(b) Small intestine :Starchα-amylaseDisaccharide (maltose)
(C) Small intestine :ProteinsPepsinAmino Acids
(d) Stomach :Fats LipaseMicelles

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The following is a scheme showing the fate of carbohydrates during digestion in the human alimentary canal. Identify the enzymes acting at stages indicated as A, B, C and D. Choose the correct option from those given.


(a) A = Amylase, B = Maltase, C = Lactase,D = Invertase

(b) A = Amylase, B = Maltase, C = Invertase,D = Lactase

(c) A = Amylase, B = Invertase, C = Maltase, D = Lactase

(d) A = Amylase, B = Lactase, C = Maltase, D = Invertase

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Cobalt is present in the molecule of

(a) vitamin B6

(b) vitamin B12

(c) vitamin B2

(d) vitamin B1

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During digestion, before the action of lipase, fat is emulsified by:-
(a) ergosterols
(b) phospholipids
(c) lipoproteins
(d) digitonin

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Sea fish are good source of

(a) iron

(b) iodine

(c) potassium

(d) all the above

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Which of the folowing teeth are lophodont ?

(a) Incisor and canine

(b) Canine and premolar

(c) Premolar and molar

(d) Premolar and incisor

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Which of the following digestive juices has the minimum pH value ?

(a) Bile

(b) Gastric juice

(c) Saliva

(d) Pancreatic juice

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In adults, curdling of the milk in small intestine occurs due to the action of

(a) rennin

(b) erypsine

(c) trypsin

(d) chymotrypsin

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The vitamin nicotinamide can be synthesized in our body from.

(a) tyrosine
(b) tryptophan
(c) valinc
(d) phenylalanine

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