BIOMOLECULES AND ENZYMES

BIOLOGY

PROTEINS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The structure of phospholipids and triglycerides include the following. 1 glycerol linked to fatty acids 2 hydrophobic fatty acid chains3 saturated fatty acid chainsWhich structures enable the formation of a lipid bilayer in cell surface membranes?
A
A 1 and 2
B
B 1 and 3
C
C 2 and 3
D
D 2 only
Explanation: 

Detailed explanation-1: -Like triglycerides, phospholipids have a glycerol backbone. But unlike triglycerides, phospholipids only have two fatty acid molecules attached to the glycerol backbone, while the third carbon of the glycerol backbone is bonded to a phosphate group-a chemical group that contains the mineral phosphorus.

Detailed explanation-2: -The phospholipid is similar to the triglyceride in that it contains fatty acid tails attached to a glycerol backbone. However, the phospholipid contains a organic phosphate zwiterion instead of a third fatty acid tail. Triglycerides are completely insoluble in water.

Detailed explanation-3: -The structure of a phospholipid molecule contains two hydrophobic tails of fatty acids and one hydrophilic head of phosphate moiety, jointed together by an alcohol or glycerol molecule [90]. Due to this structural arrangement, PLs form lipid bilayers and are a key component of all the cell membranes.

Detailed explanation-4: -A phospholipid is a lipid made of glycerol, two fatty acid tails, and a phosphate-linked head group. Biological membranes usually involve two layers of phospholipids with their tails pointing inward, an arrangement called a phospholipid bilayer.

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