Chitin is a

Assertion $A$: Starch is a homopolymer of glucose.
Reason $R$: Digestion of starch yields glucose.
Which option is correct for Assertion $A$ and Reason $R$?

The concentration of glucose in the blood of a healthy individual is $......$.

Which of the following is considered a reserve fuel in animals?

Humans ingest carbohydrates as a source of energy,which are obtained from ......

Identify the biological importance of carbohydrates from the following statements:
$1$. In the structure of cell wall.
$2$. As a food storage substance.
$3$. In protein synthesis.
$4$. As enzymes.
$5$. In the structure of $DNA$.