Question

12. The proteins and lipids, are essential for building
the cell membrane is manufactured by :

• A. (a) Endoplasmic reticulum
  
• B. (b) Golgi apparatus
  
• C. (c) Plasma membrane
  
• D. (d) Mitochondria

Answer 1

The correct option is A

(a) Endoplasmic reticulum

Solution

(a) Endoplasmic reticulum

Explanation of the correct option.

(1) Endoplasmic reticulum is a membrane-bound organelle of the cell which is attached to the outer membrane of the nucleus.

(2) It is of two types

(a ) Smooth endoplasmic reticulum is involved in the synthesis of lipids

(b) Rough endoplasmic reticulum is involved in the synthesis of proteins.

Explanation of the incorrect option.

(1) Golgi apparatus, Mitochondria, and Plasma membrane are not involved in the synthesis of proteins and lipids.

(2) Golgi apparatus helps in the modification and packaging of lipids and proteins.

(3) Mitochondria synthesizes ATP.

(4) Plasma membrane is the outer covering of the cell which helps in protection.

Concluding statement

The proteins and lipids, essential for building the cell membrane, are manufactured by the Endoplasmic reticulum.