One of the building blocks of lipids, the triglyceride, is composed of?

Biology Homework Help: Questions and Answers: One of the building blocks of lipids the triglyceride is composed of?

a) Fatty Acids and 3 Glycerol
b) 3 Fatty Acids and 1 Glycerol
c) 1 Fatty Acid and 3 Glycerol
d) 1 Fatty Acid and 3 Glycerol

Answer:

First, let’s understand the question: Its about composition of a triglyceride, one of the building blocks of lipids.

What is a Triglyceride?

• A triglyceride is a type of lipid (fat) molecule.
• It is made up of two key components:
  1. Glycerol: A three-carbon molecule (which acts as a backbone).
  2. Fatty Acids: Long hydrocarbon chains with a carboxyl group (-COOH) at one end.

Structure of a Triglyceride:

• A triglyceride consists of one glycerol molecule attached to three fatty acid molecules. The fatty acids are linked to the glycerol through ester bonds formed during a dehydration synthesis reaction.

Given Options: Step by Step Answering

a) Fatty Acids and 3 Glycerol

• This is incorrect because a triglyceride has 3 fatty acids and 1 glycerol, not the other way around.

b) 3 Fatty Acids and 1 Glycerol

• This is correct. A triglyceride is composed of 1 glycerol molecule and 3 fatty acids.

c) 1 Fatty Acid and 3 Glycerol

• This is incorrect. There is only 1 glycerol molecule in a triglyceride, not 3.

d) 1 Fatty Acid and 3 Glycerol

• This is incorrect for the same reason as Option C.

Final Answer

Based on the above analysis, the correct answer is:

b) 3 Fatty Acids and 1 Glycerol

Triglycerides are formed by a glycerol molecule binding to three fatty acids.

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