Question 1

Which process is depicted in the first image, and what is its biological significance?

Accepted Answer

Dehydration synthesis; it is used to join monomers into polymers by removing water.

Question 2

Refer to the second image. What type of reaction is shown, and what is a key outcome of this reaction in the human body?

Accepted Answer

Hydrolysis; energy is released as macromolecules are broken down.

Question 3

The third image shows the formation of a triglyceride. Which molecules are required for this reaction, and what type of reaction is it?

Accepted Answer

Glycerol and three fatty acids; dehydration synthesis

Question 4

Based on the fourth image, what type of fat is depicted and what is a key characteristic?

Accepted Answer

Saturated fat; contains only single bonds and straight tails

Question 5

The fifth image shows a triglyceride with kinked tails. What causes these kinks and what is the biological consequence?

Accepted Answer

Presence of double bonds; prevents tight packing, making the fat liquid at room temperature

Question 6

The sixth image depicts a phospholipid. What unique property does this molecule have, and why is it important for cell membranes?

Accepted Answer

It has a hydrophilic head and hydrophobic tails, enabling the formation of bilayers.

Question 7

Which of the following best describes the difference between saturated and unsaturated fatty acids, as illustrated in the images?

Accepted Answer

Saturated fatty acids have straight tails, while unsaturated fatty acids have kinked tails due to double bonds.

Question 8

Which macromolecule class is primarily responsible for energy storage in animals, as shown in the images?

Accepted Answer

Lipids (triglycerides)

Question 9

What is the main structural difference between a triglyceride and a phospholipid, as seen in the images?

Accepted Answer

Triglycerides have three fatty acid tails, while phospholipids have two fatty acid tails and a phosphate group.

Question 10

Which process, shown in the images, is responsible for breaking down glycogen into glucose molecules during fasting?

Accepted Answer

Hydrolysis

Question 11

A patient is diagnosed with a disorder that prevents the breakdown of polysaccharides. Which reaction is most likely impaired?

Accepted Answer

Hydrolysis

Question 12

Which of the following statements about the formation of macromolecules is supported by the images?

Accepted Answer

Macromolecules are formed by removing water from monomers (dehydration synthesis).

Question 13

Which of the following best explains why unsaturated fats are liquid at room temperature, as shown in the images?

Accepted Answer

Their fatty acid tails have kinks due to double bonds, preventing tight packing.

Question 14

Which of the following is a function of oligosaccharides as described in the study materials?

Accepted Answer

Cell-cell recognition and communication

Question 15

Which of the following best describes the role of phospholipids in biological membranes?

Accepted Answer

They form a bilayer with hydrophilic heads facing outward and hydrophobic tails facing inward.

Question 16

Which of the following is a correct example of a disaccharide and its component monosaccharides?

Accepted Answer

Maltose: glucose + glucose

Question 17

Which of the following statements about steroids is correct based on the study materials?

Accepted Answer

Steroids have a backbone of three six-membered rings and one five-membered ring.

Question 18

Which of the following best explains why cellulose cannot be digested by humans, even though it is made of glucose monomers?

Accepted Answer

Humans lack the enzyme to break the specific bonds in cellulose.

Question 19

Which of the following is a correct description of glycogen?

Accepted Answer

A polysaccharide used for energy storage in animals

Macromolecules: Structure, Formation, and Biological Roles

Study Guide - Practice Questions