The number of chiral centres in penicillin is

Identify the source of linen from the following:

Which element among the following is not present in saccharin?

Identify the correct statements from the following:
$I)$ When $DNA$ is hydrolysed,adenine and thymine are obtained in equal quantities.
$II)$ When $RNA$ is hydrolysed,adenine and uracil are obtained in equal quantities.
$III)$ Amylose is a branched polymer with $\alpha-1 \rightarrow 4$ and $\alpha-1 \rightarrow 6$ glycosidic linkages.
$IV)$ Addison disease is due to the abnormal functioning of adrenal cortex.

The functional groups present in the given structure of Cortisone are:

Which of the following statements are correct?
$(A)$ $A$ tripeptide has two peptide bonds.
$(B)$ $A$ pentapeptide contains five amino acids.
$(C)$ Nucleotide is a product of base and sugar.
$(D)$ In cellulose,$\beta$-glycosidic linkages are present.