Optical activity is shown by

The number of chiral centres in penicillin is

$A, B$ and $C$ are three biomolecules. The results of the tests performed on them are given below:

	$\text{Molisch's Test}$	$\text{Barfoed Test}$	$\text{Biuret Test}$
$A$	$\text{Positive}$	$\text{Negative}$	$\text{Negative}$
$B$	$\text{Positive}$	$\text{Positive}$	$\text{Negative}$
$C$	$\text{Negative}$	$\text{Negative}$	$\text{Positive}$

$A, B$ and $C$ are respectively:

The number of chiral carbons in chloramphenicol is

Assertion : $DNA$ as well as $RNA$ molecules are found in the nucleus of a cell.
Reason : On heating,the enzymes do not lose their specific activity.

Which among the following statements about terpenes is $NOT$ true?