Question

A membrane-lined system of channels present throughout the cytoplasm is

• A. Endoplasmic reticulum
• B. Golgi apparatus
• C. Microtubules
• D. Both B and C

Answer 1

Answer: (A)

Endoplasmic reticulum

• A membrane-lined system of channels present throughout the cytoplasm is endoplasmic reticulum.
• The endoplasmic reticulum (smooth and rough) is an interconnected network of flattened, membrane-enclosed sacs or tube-like structure which are evenly distributed throughout the cytoplasm.
• It forms a continuous network with the nuclear membrane.
• It helps in the synthesis of proteins (rough). lipids and carbohydrates (smooth) etc.
• So, the correct answer is 'Endoplasmic reticulum'.