Question 1

Which of the following classes of biological macromolecules is NOT considered a polymer?

Accepted Answer

Lipids

Question 2

A dehydration reaction is essential for the synthesis of which of the following molecules?

Accepted Answer

Polysaccharides

Question 3

Which of the following best explains why cellulose cannot be digested by humans?

Accepted Answer

Humans lack enzymes to hydrolyze $$\beta$$ glycosidic linkages in cellulose.

Question 4

Which polysaccharide is used by fungi for structural support in their cell walls?

Accepted Answer

Chitin

Question 5

Compared to tropical fish, arctic fish oils have:

Accepted Answer

More unsaturated fatty acids

Question 6

Which of the following statements about phospholipids is correct?

Accepted Answer

They are the main component of cell membranes, forming a bilayer.

Question 7

Which of the following best describes the relationship between ribose and ribulose?

Accepted Answer

They are structural isomers.

Question 8

A protein's tertiary structure is primarily stabilized by:

Accepted Answer

Interactions between R groups, including hydrogen bonds, ionic bonds, hydrophobic interactions, and disulfide bridges

Question 9

Which of the following is a correct statement about the function of fats in animals?

Accepted Answer

Fats are stored in adipose cells and provide cushioning for organs.

Question 10

Which of the following bonds is formed during the synthesis of a disaccharide from two monosaccharides?

Accepted Answer

Glycosidic linkage

Question 11

Which of the following best explains why starch and cellulose, both polymers of glucose, have different properties?

Accepted Answer

They have different types of glycosidic linkages ($$\alpha in $$starch, $$\beta in $$cellulose).

Question 12

Which of the following is TRUE about the structure of DNA?

Accepted Answer

It is a double helix with antiparallel strands held together by complementary base pairing.

Question 13

A single amino acid substitution in the primary structure of hemoglobin leads to sickle-cell disease. This is an example of:

Accepted Answer

How primary structure determines protein function

Question 14

Which of the following statements about lipids is correct?

Accepted Answer

Lipids do not dissolve well in water due to their nonpolar nature.

Question 15

Which of the following best describes the role of chaperonins in cells?

Accepted Answer

They assist in the proper folding of other proteins.

Question 16

Which of the following is a function of cholesterol in animal cell membranes?

Accepted Answer

It helps maintain membrane fluidity and stability.

Question 17

Which of the following statements about the synthesis of macromolecules is correct?

Accepted Answer

Dehydration reactions remove a water molecule to form a new bond between monomers.

Question 18

Which of the following is a correct pairing of a macromolecule and its monomer?

Accepted Answer

Nucleic acid – nucleotide

Question 19

Which of the following best explains why unsaturated fats are liquid at room temperature while saturated fats are solid?

Accepted Answer

Unsaturated fats have double bonds that create kinks, preventing tight packing.

Question 20

In the cell membrane, cholesterol is oriented with its hydroxyl group facing which direction?

Accepted Answer

Toward the aqueous environment (outward)

Macromolecules: Structure and Function of Large Biological Molecules

Study Guide - Practice Questions