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Which one of the following cellular part...

Which one of the following cellular parts is correctly described

A

Thylakoids - flattened membranous sacs forming the grana of chloroplast

B

Centrioles - sites for active RNA synthesis

C

Ribosomes - those on chloroplasts are larger (8OS) while those in the cytoplasm are smaller (70S)

D

Lysosomes - optimally active at a pH of about 8.5

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The correct Answer is:
A
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