Question 1

Which of the following elements are the primary components of biological macromolecules in living organisms?

Accepted Answer

Carbon, hydrogen, oxygen, and nitrogen

Question 2

A dehydration reaction is essential for the synthesis of biological polymers. Which of the following best describes what occurs during a dehydration reaction?

Accepted Answer

A water molecule is removed as two monomers are covalently bonded together

Question 3

Which of the following statements about hydrolysis reactions in cells is correct?

Accepted Answer

Hydrolysis reactions break covalent bonds in polymers by adding a water molecule

Question 4

Which of the following is NOT a polymer built from monomers in the same 'end-to-end' fashion as the others?

Accepted Answer

Fatty acids and membrane lipids

Question 5

A scientist is studying a reaction in which a long chain of glucose molecules is broken down into individual glucose units. Which type of reaction is this, and what is consumed in the process?

Accepted Answer

Hydrolysis; water is consumed

Question 6

Which of the following best explains why enzymes are necessary for both dehydration and hydrolysis reactions in cells?

Accepted Answer

These reactions are unlikely to occur efficiently without enzymes to lower the activation energy

Question 7

Which of the following is a correct comparison between starch and cellulose, two polysaccharides found in plants?

Accepted Answer

Starch is used for energy storage, while cellulose provides structural support

Question 8

Which of the following best describes the general structure of a monosaccharide?

Accepted Answer

A single ring or chain of carbon atoms with multiple hydroxyl ($-OH$) groups

Question 9

A patient is diagnosed with a genetic disorder that prevents the breakdown of glycogen in their liver. Which process is most likely impaired in this patient?

Accepted Answer

Hydrolysis of polysaccharides

Question 10

Which of the following equations correctly represents the dehydration reaction for forming a disaccharide from two monosaccharides?

Accepted Answer

$C_6H_{12}O_6 + C_6H_{12}O_6 \rightarrow C_{12}H_{22}O_{11} + H_2O$

Question 11

Which of the following statements about the role of sugars in cells is FALSE?

Accepted Answer

Sugars are the primary structural component of cell membranes

Question 12

Which of the following best describes the difference between a monomer and a polymer?

Accepted Answer

A monomer is a small, repeating unit that can be linked to form a larger molecule called a polymer

Question 13

During cellular respiration, glucose is broken down to produce ATP. Which type of macromolecule is glucose, and what is its primary function in this context?

Accepted Answer

Carbohydrate; energy source

Question 14

Which of the following best explains why hydrolysis reactions are considered exergonic?

Accepted Answer

They release energy as covalent bonds are broken

Question 15

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

Accepted Answer

Maltose; composed of two glucose molecules

Question 16

A researcher is studying the synthesis of a protein. Which of the following processes is most similar to the synthesis of a polysaccharide from monosaccharides?

Accepted Answer

Dehydration reactions linking amino acids by peptide bonds

Question 17

Which of the following best describes the role of enzymes in the breakdown of biological macromolecules?

Accepted Answer

Enzymes catalyze hydrolysis reactions, making them occur more efficiently

Question 18

Which of the following statements about the formation and breakdown of biological macromolecules is correct?

Accepted Answer

Dehydration reactions build polymers; hydrolysis reactions break them down

Question 19

Which of the following best explains why matter is not created or destroyed during the formation or breakdown of biological macromolecules?

Accepted Answer

Atoms are simply rearranged during chemical reactions

Building Biological Molecules: Monomers, Polymers, and Carbohydrates

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