Spliceosomes are composed of
(a)-snrnas and other proteins
(b)-polymerases and ligases
(c)-introns and exons
(d)the rna transcript and protein.
(e)- snrnp and snumps

(a)-snRNAs and other proteins

splisosomes are composed of snRNA and other protein.

splisosomes are found in the nucleus of a cell.

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.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.