Question 1

Which type of bond connects the fatty acid chains to the R1, R2, and R3 positions of glycerol in triacylglycerols?

Accepted Answer

Phosphodiester bonds.

Question 2

A triacylglycerol molecule is composed of which of the following components?

Accepted Answer

Three fatty acids and one glycerol.

Question 3

Which of the following best describes a mixed triacylglycerol?

Accepted Answer

A triacylglycerol with three different fatty acids.

Question 4

What is the primary biological function of triacylglycerols in animals?

Accepted Answer

Storing long-term energy.

Question 5

Which of the following statements about fatty acid oxidation in triacylglycerols is correct?

Accepted Answer

Fatty acids are completely oxidized to provide energy.

Question 6

Which of the following is a correct formula for the formation of a triacylglycerol from glycerol and fatty acids?

Accepted Answer

$\mathrm{Glycerol} + 3\ \mathrm{Fatty\ acids} \rightarrow \mathrm{Triacylglycerol} + 3\ \mathrm{H_2O}$

Question 7

Which of the following is NOT a function of triacylglycerols in animals?

Accepted Answer

Encoding genetic information.

Question 8

Which enzyme catalyzes the synthesis of triacylglycerols from glycerol and fatty acids?

Accepted Answer

Acyltransferase.

Question 9

In the context of triacylglycerols, what does the term 'simple triacylglycerol' refer to?

Accepted Answer

A triacylglycerol with three identical fatty acids.

Question 10

Which of the following best explains why triacylglycerols are more efficient for energy storage than carbohydrates?

Accepted Answer

They are less oxidized and yield more energy per gram.

Question 11

Which of the following is a correct description of the structure of a triacylglycerol?

Accepted Answer

A glycerol backbone esterified to three fatty acids.

Question 12

Which of the following is a consequence of the hydrophobic nature of triacylglycerols?

Accepted Answer

They aggregate in aqueous environments, forming droplets.

Question 13

Which of the following best describes the difference between 'chain' and 'fat' triacylglycerols as depicted in the study material?

Accepted Answer

'Chain' triacylglycerols have unsaturated fatty acids, while 'fat' triacylglycerols have saturated fatty acids.

Question 14

Which of the following is a correct statement about the synthesis of triacylglycerols?

Accepted Answer

It is a dehydration reaction that forms ester bonds.

Question 15

Which of the following best explains why triacylglycerols are stored in specialized cells called adipocytes?

Accepted Answer

Adipocytes are specialized for the synthesis and storage of large amounts of triacylglycerols.

Triacylglycerols: Structure, Function, and Biological Importance

Study Guide - Practice Questions