Question

The proteins and lipids essential for building the cell membrane are manufactured by

• A. endoplasmic reticulum
• B. Golgi apparatus
• C. plasma membrane
• D. mitochondria

Answer 1

The correct option is A

endoplasmic reticulum

The correct option is A.

Explanation of the correct option:

1. A network of membranous tubules present in the cytoplasm of a eukaryotic cell is known as the endoplasmic reticulum.
2. The endoplasmic reticulum is continuous with the nuclear membrane.
3. It plays an important role in protein synthesis, lipid metabolism, and calcium storage.
4. The endoplasmic reticulum has ribosomes attached to it.
5. The function of ribosomes is to synthesize proteins.
6. Thus, the endoplasmic reticulum and the ribosomes function together to produce proteins and lipids essential for building the cell membrane.

Explanation of the incorrect options:

Option B:

Golgi apparatus helps in the transportation of lipids and in the formation of lysosomes.

Option C:

The plasma membrane forms the boundary of the cell, separating the internal metabolic contents from the external surroundings.

Option D:

Mitochondria are membrane-bound cell organelles that synthesize the energy required for cellular activities or biochemical reactions.

Final answer: The proteins and lipids essential for building the cell membrane are manufactured by the endoplasmic reticulum.