Enzymes,vitamins,and hormones can be classified into a single category of biological chemicals because all of them:

Which of the following statements are correct?
$(a)$ Proteins are heteropolymers of amino acids.
$(b)$ The sugar found in nucleic acids is of the $\beta$-type.
$(c)$ Nucleic acids exhibit acidic properties.
$(d)$ $5$-methyl uracil is attached to the first carbon atom of the ribose sugar.
$(e)$ Collagen is the most abundant protein found in the plant kingdom.

The given figures represent the nitrogenous bases of nucleic acids. Identify the correct group.

Vitamin $C$ is

Which of the following vitamins is correctly matched with its solubility and the deficiency disease it causes?

The most abundant intracellular cation is