A) ribophorin
B) magnesium
C) peptidyl transferase
D) tRNA
Correct Answer: A
Solution :
There are large non-membranous RNA protein complexes which are necessary for protein synthesis. There are dense granules of 150 to 200 \[{\AA}\] diameter (as revealed by electron microscope) and found either in free state or attached to the outside of cytoplasmic membrane just like that of ER or nuclear membrane, etc through ribophorins.
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