Why is cisternae associated with 60s subunit and not with 40 S ribosome?

Asked by pb_ckt | 20th Apr, 2019, 11:06: PM

Expert Answer:

  • 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 | 22nd Apr, 2019, 03:11: PM