Which one of the following enzymes carries on the initial step in the digestion of milk in humans?

1. Trypsin

2. Pepsin

3. Rennin

4. Lipase

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Solution

In humans milk protein digesting enzyme in stomach is pepsin. In calves it is rennin. Rennin is also present in small amounts in human infants but not adults. Pepsin acts on water soluble caseinogen (milk protein) to form solubles 'casein'. This combines with calcium salts to form insoluble calcium paracaseinate, which gets readily digested enzymatically. Answer: (2)

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(a) What is common for Cuscuta, ticks and leeches?
(b) Name the substances on which the following enzymes act in the human digestive system :
(i) Trypsin (ii) Amylase (iii) Pepsin (iv) Lipase
(c) Why the absorption of digested food occurs mainly in the small intestine?

1. Choose the correct answer among the following:

(a) Gastric juice contains

(i) pepsin, lipase and rennin

(ii) trypsin lipase and rennin

(iii)trypsin, pepsin and lipase

(iv)trypsin, pepsin and renin

(b)Succus entericus is the name given to

(i) a junction between ileum and large intestine

(ii) intestinal juice

(iii)swelling in the gut

(iv)appendix

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Which one of the following enzymes carries on the initial step in the digestion of milk in humans? 1. Trypsin 2. Pepsin 3. Rennin 4. Lipase

Which one of the following enzymes carries on the initial step in the digestion of milk in humans?

1. Trypsin

2. Pepsin

3. Rennin

4. Lipase