Q: Which equation correctly represents the cellular respiration of glucose?

$\mathrm{C_6H_{12}O_6} + 6\ \mathrm{O_2} \rightarrow 6\ \mathrm{CO_2} + 6\ \mathrm{H_2O} + \text{energy}$

Question 1

Which of the following best describes the structural difference between saturated and unsaturated fatty acids?

Accepted Answer

Saturated fatty acids have no double bonds between carbon atoms, allowing them to pack closely together.

Question 2

Which equation correctly represents the cellular respiration of glucose?

Accepted Answer

$\mathrm{C_6H_{12}O_6} + 6\ \mathrm{O_2} ightarrow 6\ \mathrm{CO_2} + 6\ \mathrm{H_2O} + 	ext{energy}$

Question 3

Which of the following is a major function of carbohydrates in living organisms?

Accepted Answer

Providing energy for cellular processes

Question 4

Which polysaccharide is the primary structural carbohydrate in plant cell walls and is indigestible by humans?

Accepted Answer

Cellulose

Question 5

A triglyceride is formed by the dehydration synthesis of which components?

Accepted Answer

One glycerol and three fatty acids

Question 6

Which of the following statements about phospholipids is correct?

Accepted Answer

They have a hydrophilic head and two hydrophobic tails, making them amphiphilic.

Question 7

Which of the following best explains why butter is solid at room temperature while olive oil is liquid?

Accepted Answer

Butter contains mostly saturated fatty acids that pack closely together, while olive oil contains unsaturated fatty acids with kinks that prevent tight packing.

Question 8

Which of the following is a correct match between a polysaccharide and its biological role?

Accepted Answer

Glycogen – energy storage in animals

Question 9

A patient is diagnosed with a genetic disorder that prevents the breakdown of glycogen. Which of the following symptoms is most likely to occur?

Accepted Answer

Low blood sugar during fasting

Question 10

Which of the following statements about chitin is true?

Accepted Answer

Chitin is a structural carbohydrate found in the cell walls of fungi and the exoskeletons of arthropods.

Question 11

Which of the following best describes the amphiphilic nature of phospholipids and its importance in cell membranes?

Accepted Answer

Phospholipids have both hydrophilic and hydrophobic regions, allowing them to form bilayers that separate the cell from its environment.

Question 12

Which of the following is a correct statement about the solubility of lipids?

Accepted Answer

Lipids are insoluble in water but soluble in nonpolar solvents.

Question 13

Which of the following is a correct description of a monosaccharide?

Accepted Answer

A simple sugar that cannot be hydrolyzed to a simpler carbohydrate

Question 14

Which of the following best explains why cellulose is not a good energy source for humans?

Accepted Answer

Humans lack the enzymes necessary to break the beta-glycosidic bonds in cellulose.

Question 15

Which of the following is a correct statement about the structure of a triglyceride?

Accepted Answer

It consists of one glycerol molecule bonded to three fatty acid chains.

Question 16

Which of the following best describes the difference between starch and glycogen?

Accepted Answer

Starch is the main energy storage polysaccharide in plants, while glycogen is the main energy storage polysaccharide in animals.

Question 17

A food scientist is developing a new low-calorie food product. Which carbohydrate should they add to increase fiber content without adding digestible calories?

Accepted Answer

Cellulose

Question 18

Which of the following best explains why trans fats are considered unhealthy?

Accepted Answer

Trans fats have a structure that allows them to pack tightly like saturated fats, increasing the risk of cardiovascular disease.

Question 19

Which of the following is a correct statement about the formation of a phospholipid?

Accepted Answer

A phospholipid is formed by attaching a phosphate group to a glycerol molecule, which is also bonded to two fatty acid chains.

Question 20

Which of the following best describes the role of dehydration synthesis in the formation of biological macromolecules?

Accepted Answer

It joins monomers together by removing a molecule of water.

Carbohydrates and Lipids: Structure, Function, and Biological Importance

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