Question

What is more abundant in S.E.R?

• A. Cisternae and vesicles
• B. Cisterns and tubules
• C. Tubules and vesicles
• D. Cisternae

Answer 1

The correct option is C Tubules and vesicles

• 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.
  
• A smooth endoplasmic reticulum lacks ribosomes.
  
• It forms a network of tubular membrane vesicles which is a part of membrane-bound organelle that is involved in the synthesis and storage of lipids (cholesterol and phospholipids).
• Vesicles are small, spherical membrane-bound sacs and tubules connect the endoplasmic reticulum to the nuclear envelope which forms a continuous membrane.
• They are abundantly found with the smooth endoplasmic reticulum.
• So, the correct answer is 'Tubules and vesicles'.