Q18 / 90 · JEE Main 2019 (10 Apr Shift 1) · Chemistry

Amylopectin is composed of:

A
$β - D -$ glucose $, C_{1} - C_{4}$ and $C_{1} - C_{6}$ linkages
B
$α - D -$ glucose, $C_{1} - C_{4}$ and $C_{2} - C_{6}$ linkages
Correct answer
C
$α - D -$ glucose, $C_{1} - C_{4}$ and $C_{1} - C_{6}$ linkages
D
$β - D -$ glucose, $C_{1} - C_{4}$ and $C_{2} - C_{6}$ linkages

Solution

Amylopectin is insoluble in water and constitutes about 80-85% starch.

Amylopectin is a water-soluble polysaccharide and highly branched polymer of a-glucose units found in plants. It is one of the two components of starch, the other being amylose. Amylopectin bears a straight/linear chain along with a number of side chains which may be branched further.

Hence, the correct answer is option: 'C'.

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