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Question

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 below:
92838.jpg
  1. A=amylase,B=maltase,C=lactase,D=invertase
  2. A=amylase,B=maltase,C=invertase,D=lactase
  3. A=amylase,B=invertase,C=maltase,D=lactase
  4. A=amylase,B=lactase,C=maltase,D=invertase

A
A=amylase,B=lactase,C=maltase,D=invertase
B
A=amylase,B=maltase,C=lactase,D=invertase
C
A=amylase,B=maltase,C=invertase,D=lactase
D
A=amylase,B=invertase,C=maltase,D=lactase
Solution
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  • Amylase is an enzyme that catalyzes the hydrolysis of starch into sugars.
  • Lactase enzyme is found in the small intestine of mammals that catalyzes the breakdown of lactose (milk sugar) into the simple sugars glucose and galactose.
  • Maltase, an enzyme that catalyzes the hydrolysis of the disaccharide maltose to the simple sugar glucose.
  • For foods that include sucrose, invertase splits the sugar into its parts of glucose and fructose.
  • So, the correct answer is 'A=amylase, B=lactase, C=maltase, D=invertase".

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92838.jpg
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