CBSE Class 11-science Answered
Why is cisternae associated with 60s subunit and not with 40 S ribosome?
Asked by pb_ckt | 20 Apr, 2019, 23:06: PM
- A major function of cisternae is modifying, sorting and packaging of proteins for secretion. It is also involved in the transport of lipids around the cell, and the creation of lysosomes.
- 60S subunit has a molecular weight which is almost double that of 40S subunit. It also produces approximately 49 proteins as compared to that of 33 proteins produced by 40S subunit.
- Since the protein production is more in 60S subunit as compared to 40S subunit, the processes of modifying, sorting and packaging of proteins is also comparatively on a larger scale in 60S subunit than 40S subunit.
- Hence, to assist this function, cisternae are associated with 60s subunit and not with 40 S ribosome.
Answered by Sheetal Kolte | 22 Apr, 2019, 15:11: PM
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