Question

Which of the following is the intracellular transport structure that helps in the protein and lipid synthesis.
(a) Ribosomes
(b) Microtubules and microfilaments
(c) Golgi complex
(d) Endoplasmic reticulum

Answer 1

Hint: Structurally, it's a network of membranes found throughout the cell and connected to the nucleus. The membranes are marginally not quite the same as from cell to cell and a cell’s function determines the dimensions and structure. It functions as a producing and packaging system.

Complete answer:
Basically, there are two sorts of endoplasmic reticulum, first one is that of the smooth endoplasmic reticulum, and therefore the other is that of the rough endoplasmic reticulum. The graceful endoplasmic reticulum is involved in the production of lipids and hormone synthesis. The rough endoplasmic reticulum possesses the ribosomes which help in protein synthesis. The organelles also are involved in the transportation of those molecules.

Additional Information: There are two basic sorts of ER. Both rough ER and smooth ER have equivalent kinds of membranes but they have different shapes. Rough ER is known as rough because it's ribosomes attached to its surface.
Smooth ER (SER) acts as a storage organelle. it's important within the creation and storage of lipids and steroids. Steroids are a sort of ringed organic molecule used for several purposes in an organism.
On the surface of the RER, the method of protein synthesis starts when mRNA moves from the nucleus to a ribosome, due to the ribosome building the amino acid chain, the chain is driven into the cisternal space of the RER.
So the correct answer is ‘Endoplasmic reticulum’.

Note: The double membranes of smooth and rough ER form sacs called cisternae. Protein molecules are synthesized and picked up within the cisternal space/lumen. At the point when enough proteins are made, they gather and are squeezed off in vesicles. The vesicles often move to the Golgi body for extra protein packaging and distribution.