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-amylase, B-maltase, C-lactase, D-invertase

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A-amylase, B-maltase, C-invertase, D-lactase

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A-amylase, B-invertase, C-maltase, D-lactase

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A-amylase, B-lactase, C-maltase, D-invertase

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Solution

The correct option is D A-amylase, B-lactase, C-maltase, D-invertase
Amylase breaks starch into maltose disaccharides.
Lactase breaks down lactose to give galactose and glucose.
Maltase breaks down maltose into glucose monomers.
Invertase breaks down sucrose into fructose and glucose.
Thus, the correct answer is 'A-amylase, B-lactase, C-maltase, D-invertase.'

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Q. How many carbohydrate digesting enzymes in the list given are found in intestinal juice? Enterokinase, Chymotrypsin, Aminopeptidase, Pepsin, Lactase, Rennin, Carboxypeptidase, Nuclease, Nucleosidase, Maltase, Sucrase.

How many enzymes in the list given below are found in intestinal juice?

Trypsin, Pepsin, Sucrase, Lactase, Rennin, Carboxypeptidase, Nuclease, Dipeptidase, Maltase, Enterokinase

Q. Regarding the digestion of carbohydrates; Match the following intermediates with the particular enzyme:

\begin{matrix} Column I (Enzyme) & Column II (Substrate) i. Amylase & a. Maltose. ii. Maltase & b.Saccharides. iii.Sucrase & c.Dextrins. iv. α Dextrinase & d.Sucrose. \end{matrix}

Q. Enzymatic reactions are given in Column I and enzymes in Column II.

Column I	Column II
$(A)$ Maltose $\to$ Glucose	$(i)$ Zymase
$(B)$ Sucrose $\to$ Glucose $+$ Fructose	$(i i)$ Pepsin
$(C)$ Glucose $\to$ Ethyl alcohol $+ C O_{2}$	$(i i i)$ Maltase
$(D)$ Starch $\to$ Maltose	$(i v)$ Invertase
$(E)$ Proteins $\to$ Amino acids	$(v)$ Diastase

Choose the correct matching of enzymatic reaction and enzyme that catalyses the correct reaction from the codes given below.

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