NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

BIO MOLECULES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which class of biomolecules is used to make cell membranes?
A
Carb
B
protein
C
nucleic acid
D
lipids
Explanation: 

Detailed explanation-1: -There are three major classes of membrane lipid molecules-phospholipids, cholesterol, and glycolipids. The lipid compositions of the inner and outer monolayers are different, reflecting the different functions of the two faces of a cell membrane.

Detailed explanation-2: -The fundamental building blocks of all cell membranes are phospholipids, which are amphipathic molecules, consisting of two hydrophobic fatty acid chains linked to a phosphate-containing hydrophilic head group (see Figure 2.7).

Detailed explanation-3: -Lipids (phospholipids, cholesterol), proteins and small quantity of carbohydrates (sugars and polysaccharides).

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