Question

Carbohydrates present in the plasma membrane are in the form of-
A. Cellulose and pectin
B. Hemicellulose and Cellulose
C. Starch and glycogen
D. Glycolipids and Glycoproteins

Answer 1

Hint: Carbohydrates as we know are a very essential part of our balanced diet. Carbohydrates are the major biomolecules that are composed of carbon, hydrogen and oxygen. In the ratio of. They are the primary energy providing biomolecules and certain organisms. They also act as building materials for making cell walls and cell membranes.

Complete answer-
Option A: Cellulose and pectin- cellulose is the cell-wall material of plant cell walls. Pectin also carries forward the same function in plants, not in animal cells.
Option A is not the correct answer.
Option B: Hemicellulose and Cellulose- hemicellulose and cellulose unlike- starch or glycogen which are animal cell wall materials hemicellulose also added up to the plant cell materials.
Option B is not the correct answer.
Option C: Starch ad glycogen- starch and glycogen contain fats not carbohydrates and they are cell wall components.
Option C is not the correct answer.
Option D: Glycolipids and Glycoproteins- glycolipids and glycoproteins are termed as carbohydrate components as they are present in the outer side of plasma membrane.

Therefore, Option D is the correct answer.

Note:
Starch is a source of carbohydrates which are abundant in food items like- rice, wheat, barley. These cereals have carbohydrates in abundance. Human beings can easily digest these cereals and obtain energy from them. cellulose is the main component in the plant cells which function is to make the plant stiff and upright so that the plant does not lose its firmness.