What are the organic compounds present in living cells called?

What is the valency of carbon?

What is the need for macromolecules in living organisms?

Select the correct option for the biomolecules found in living organisms.
Classification of biomolecules from a chemical perspective $- P$
Classification of biomolecules from a biological perspective $- Q$

Option	$P$ (Chemical Perspective)	$Q$ (Biological Perspective)
$A$	Aldehydes,ketones,aromatic compounds	Amino acids,nucleotide bases,fatty acids
$B$	Amino acids,nucleotide bases,fatty acids	Aldehydes,ketones,aromatic compounds
$C$	Amino acids,ketones,aromatic compounds	Aldehydes,nucleotide bases,fatty acids
$D$	Aldehydes,nucleotide bases,fatty acids	Amino acids,ketones,aromatic compounds

What are known as biomacromolecules?

The three-dimensional structure of macromolecules in a cell is maintained by which of the following?