Question

Which of the following is responsible for mechanical support and enzyme transport?

• A. Dictyosome
• B. Cell membrane
• C. Endoplasmic reticulum
• D. Mitochondria

Answer 1

Answer: (C)

Endoplasmic reticulum

Dictyosomes are stacks of flat, membrane-bound cavities and comprise Golgi apparatus. They serve in storage, modification, sorting, and packaging of proteins into vesicles for transport.
Plasmalemma/cell membrane is the biological membrane that separates the cell’s interior from surrounding. It is a phospholipid bilayer with embedded protein and serves as a selectively permeable membrane.
The endoplasmic reticulum is a eukaryotic organelle with a network of tubules, vesicles and cisternae within the cells. It serves in synthesis and transport of proteins (enzymes are the protein molecules that speed up the rate of reactions) and lipids and also provides skeletal support to the cytoplasmic matrix.
Mitochondria are double membrane bound eukaryotic cell organelles that serve as a site for cellular respiration, produce an enormous amount of energy and therefore are also known as the power house of cell.
So, the correct answer is option C.