Which cellular process takes place in the ribosomes that are bound to the endoplasmic reticulum?
A. The replication of nucleic acids
B. The breakdown for waste material
C. The conversion of radiant energy to glucose
D. The synthesis of new proteins

I belivie the answer is C

Explanation:

The endoplasmic reticulum can be smooth or rough, and in general its function is to produce proteins so that the rest of the cell can function. The rough endoplasmic reticulum contains ribosomes, which are small, round organelles whose job is to make these proteins. Sometimes when proteins are made improperly, they get caught in the endoplasmic reticulum and overload it, leaving it cramped, in a way, and the proteins don't go where they should go. Then there is the smooth endoplasmic reticulum, which has no ribosomes in it, and which produces other substances that the cell needs. Thus, the endoplasmic reticulum is an organelle that is really a workhorse in the production of proteins and substances that the rest of the cell needs.

I hope help you

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answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;