LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Lactase is an enzyme that has a specific substrate it breaks down called lactose. When lactase breaks down lactose both galactose and ____ are formed as products.
A
fructose
B
glucose
C
sucrose
D
cellulose
Explanation: 

Detailed explanation-1: -Lactose is a disaccharide consisting of 2 monosaccharides, glucose and galactose, linked together via a -1→4 bond. Hydrolysis of this bond requires a specific enzyme called lactase which digests lactose to its components allowing the uptake of glucose and galactose from the intestine.

Detailed explanation-2: -Lactase catalyzes the hydrolysis of the glycosidic bond in the disaccharide lactose, releasing galactose and glucose (Figure 2)5.

Detailed explanation-3: -Lactase functions at the brush border to break down lactose into smaller sugars called glucose and galactose for absorption.

Detailed explanation-4: -Lactose consists of two sugars: glucose and galactose. An enzyme in our small intestine called lactase quickly breaks down the lactose into its two parts. Only after the two sugars have been separated can they be absorbed by our bowel.

Detailed explanation-5: -With the aid of the enzyme, lactase, the substrate, lactose, is broken down into two products, glucose and galactose.

There is 1 question to complete.