Question

   The smooth and rough endoplasmic reticulum A.   are connected, and connected to the outer leaflet...

   The smooth and rough endoplasmic reticulum

A.   are connected, and connected to the outer leaflet of the nuclear envelope

B.   have different functions: the smooth is involved in lipid synthesis, the rough is a site of protein synthesis

C.   are not connected, but have different functions

D.   are connected but have the same functions

E.   are both connected to the Golgi and the nucleus

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Answer #1

The correct options are: A and B

  1. are connected, and connected to the outer leaflet of the nuclear envelope
  2. have different functions: the smooth is involved in lipid synthesis, the rough is a site of protein synthesis

Explanation: The endoplasmic reticulum is connected to the outer membrane of the nucleus. Both RER and SER are connected but they are not connected with a membrane to Golgi complex, however Golgi complex is in close proximity to ER. RER an SER have different roles to play like RER is mainly involved in the protein synthesis while SER is involved in lipid synthesis and detoxification.

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