9. in the synthesis of proteins, what is the function
of messenger-rna molecules?

1) they act as a template for the synthesis of
dna.

2) they carry information that determines the
sequence of amino acids.

3) they remove amino acids from the nucleus.

4) they carry specific enzymes for dehydration
synthesis.

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.