What is organized by macromolecules?

Cellulose is a ...........

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

In organic compounds,which bonds formed by atoms lead to the creation of simple and complex structures?

Give a scientific reason: Although the molecular weight of lipids is less than $1000 \text{ Dalton}$,they are included in biomacromolecules.

The chemical name of Vitamin $D$ is . . . . . . .