Which of the following statements are correct ?
- In prokaryotic cells, a special membranous structure formed by the extension of the plasma membrane into the cell is known as polysome.
- The smooth endoplasmic reticulum is the major site for synthesis of glycoproteins.
- RuBisCO is the most abundant protein in the whole biosphere.
- Mitochondria, chloroplasts and peroxisomes are not considered as part of endomembrane system. Of the above statements
(iii) and (iv)
(i) and (ii)
(ii) and (iii)
(i) and (iv)
Correct Answer :
A. (iii) and (iv)
The special membranous structure formed by the extension of prokaryotic plasma membrane is known as mesosome while polysome is structure formed by combination of many ribosomes. SER is the major site of synthesis of lipids. The site of protein synthesis is RER.