Which of the following is NOT involved in
the synthesis of proteins?
(a) rough ER
(b) smooth ER
(c) Golgi body
(d) ribosomes
Answer: (b) smooth ER.
Rough ER is the site for protein synthesis and has ribosomes embedded. Ribosomes on the rough ER
produce proteins that are passed from the cell; the Golgi body then packages them for this purpose.
Smooth ER is used mainly in the making of lipids and detoxifying enzymes.
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