What does dna provide the code for?

The correct answer will be proteins and essential molecules.

Explanation:

DNA is made up of sugar, a phosphate group and nitrogenous bases. These nitrogenous bases are read by the ribosomes during translation in a group of three bases called "triplets or codons". These codons provide the instructions for the synthesis of proteins as each codon codes for amino acids which make up a protein when bonded.

Thus, proteins and essential molecules are the correct answer.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

the answer to your question is:

c. complementary base-pairing