Question

The smooth endoplasmic reticulum is the major site for the synthesis of
A) Proteins
B) Lipids
C) Carbohydrates
D) Vitamins

Answer 1

Hint: It is a macromolecule that does not dissolve in water but dissolve in organic solvent. It makes the building blocks of life.

Complete Answer:
A) Proteins are the main component of the human body. They are the building blocks of our tissue and serve as a fuel source. Becoming a fuel, proteins provide much more energy density like carbohydrates: 4 kcal per gram.

B) Lipids are defined as small molecules that are hydrophobic in nature. It is an amphiphilic molecule which allows them to create structures like vesicles, unicellular or multilamellar liposomes. The work of lipids is that it stores energy, and acts as structural components of the cell. It is the main site for synthesizing. Mainly steroid hormones are synthesized via lipid.

C) Carbohydrate is a molecular compound having carbon, hydrogen and oxygen.All the cellulose, starch and sugar comes under this group. It serves as energy storage or structural component in plants and animals. Sometimes it carries molecules that play an important role in fertilization, immune system etc.

D) Vitamin is an organic molecule and also an essential micronutrient which is needed for all organisms during metabolism. There are different types of vitamins present in foods and can cure several diseases. Some of them are vitamin A, D, E, K, B1, B12 etc.

Hence Option B: Lipids is the correct answer.

Note: Endoplasmic reticulum is of 2 types such as rough endoplasmic reticulum and smooth endoplasmic reticulum. Rough endoplasmic reticulum is synthesized and is responsible for some protein synthesis also.