Question

List the correct sequence of location of events which takes place in protein synthesis and modification in a cell.

I. Ribosome

II. Nucleus

III. Golgi apparatus

IV. Endoplasmic reticulum

• A. I, II, III, IV
• B. II, I, IV, III
• C. III, II, IV, I
• D. II, I, III, IV
• E. IV, III, II, I

Answer 1

Answer: (B)

II, I, IV, III

RNA which serves to carry genetic information from DNA to protein is synthesized in the nucleus (II) via the process of transcription. Post-transcriptional modification of RNA is followed by its transport into the cytoplasm where it joins ribosome (I) to initiate the process of photosynthesis. Since ribosomes are present on ER, the newly synthesized proteins are modified on ER (IV). Golgi body (III) then processes secretory and synthetic proteins from the ER and then transport the finished products into cell part or secretes them to the outside of the cell. This makes B correct answer.