Question 1

Which chemical reaction is responsible for the formation of the triglyceride molecule shown in the diagram above?

Accepted Answer

Condensation (dehydration synthesis) reaction

Question 2

How many water molecules are produced when the triglyceride molecule in the diagram is formed from its components?

Accepted Answer

$$3$$

Question 3

Which of the following best describes the difference between a saturated and an unsaturated fatty acid, as seen in the diagram?

Accepted Answer

Saturated fatty acids contain only single bonds between carbon atoms, while unsaturated fatty acids contain one or more double bonds.

Question 4

If one of the fatty acids in the triglyceride structure contains a double bond, what effect does this have on the physical properties of the triglyceride?

Accepted Answer

It decreases the melting point, making the triglyceride more likely to be liquid at room temperature.

Question 5

What type of bond forms between the glycerol backbone and each fatty acid in the triglyceride molecule?

Accepted Answer

Ester bond

Question 6

Which functional group is found at the end of each fatty acid before it is joined to glycerol in the formation of a triglyceride?

Accepted Answer

Carboxyl group ($$-COOH)$$

Question 7

Which of the following statements about triglycerides is correct?

Accepted Answer

They are composed of three fatty acids and one glycerol molecule.

Question 8

What is the primary biological function of triglycerides in animals?

Accepted Answer

To provide long-term energy storage

Question 9

Which property do all lipids, including triglycerides, have in common?

Accepted Answer

They are hydrophobic and do not dissolve easily in water.

Question 10

If a triglyceride contains only saturated fatty acids, what is its likely state at room temperature?

Accepted Answer

Solid

Practice Questions: Lipids and Triglyceride Structure

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