Macromolecules

Help Questions

SAT Subject Test in Biology › Macromolecules

Questions 1 - 10
1

Polysaccharides are considered sugar moieties that include 3 or more monomeric saccharides together.

Which of the following is/are polysaccharide(s)?

I. Glycogen
II. Starch
III. Cellulose

I, II, and III

I only

I and II

I and III

II and III

Explanation

Glycogen, starch, and cellulose are all polysaccharides composed of many glucose monomers linked together.

2

Polysaccharides are considered sugar moieties that include 3 or more monomeric saccharides together.

Which of the following is/are polysaccharide(s)?

I. Glycogen
II. Starch
III. Cellulose

I, II, and III

I only

I and II

I and III

II and III

Explanation

Glycogen, starch, and cellulose are all polysaccharides composed of many glucose monomers linked together.

3

In which of the following molecular forms do animals store energy?

Lipids and glycogen

Lipids only

Glycogen only

Glycogen and peptidoglycan

Peptidoglycan only

Explanation

Both lipids (fat) and glycogen (made up of glucose molecules) store energy in animals. Lipids are used for long-term energy storage while glycogen, found in the liver and muscles, is used for short-term energy storage. Peptidoglycan is the molecule that makes up the bacterial cell walls.

4

Carbohydrates represent important macromolecules in the biochemical pathways of many organisms.

Which of the following is/are monosaccharide(s)?

I. Glucose
II. Fructose
III. Maltose

I and II

I only

I and III

II and III

I, II, and III

Explanation

Glucose and fructose are monomeric saccharides, or monosaccharides. The carbon to hydrogen to oxygen ratio exists in a 1:2:1 pattern indicative of a monomeric saccharide. The molecular formula of glucose and fructose is . Maltose is a disaccharide composed of two molecules of glucose.

5

In which of the following molecular forms do animals store energy?

Lipids and glycogen

Lipids only

Glycogen only

Glycogen and peptidoglycan

Peptidoglycan only

Explanation

Both lipids (fat) and glycogen (made up of glucose molecules) store energy in animals. Lipids are used for long-term energy storage while glycogen, found in the liver and muscles, is used for short-term energy storage. Peptidoglycan is the molecule that makes up the bacterial cell walls.

6

Carbohydrates represent important macromolecules in the biochemical pathways of many organisms.

Which of the following is/are monosaccharide(s)?

I. Glucose
II. Fructose
III. Maltose

I and II

I only

I and III

II and III

I, II, and III

Explanation

Glucose and fructose are monomeric saccharides, or monosaccharides. The carbon to hydrogen to oxygen ratio exists in a 1:2:1 pattern indicative of a monomeric saccharide. The molecular formula of glucose and fructose is . Maltose is a disaccharide composed of two molecules of glucose.

7

Which organic compound serves as stored energy for living things?

Lipids

Nucleic acids

Carbohydrates

Proteins

Explanation

Lipids make up the bulk of fat in animal tissues and thus stores energy.

8

The phospholipid bilayer is critically important to the separation of the internal and external environment of the cell.

What drives the formation of the phospholipid bilayer?

The external environment pushes non-polar hydrophobic fatty acid tails to form the inner layer and the polar hydrophilic head groups to form the outer layer.

The external environment pushes non-polar hydrophilic fatty acid tails to form the inner layer and the polar hydrophobic head groups to form the outer layer.

The external environment pushes non-polar hydrophilic fatty acid tails to form the inner layer and the polar hydrophilic head groups to form the outer layer.

The external environment pushes non-polar hydrophobic fatty acid tails to form the inner layer and the polar hydrophobic head groups to form the outer layer.

None of these

Explanation

The external hydrophilic environment attracts polar hydrophilic phosphate head groups to the exterior, while allowing non-polar hydrophobic fatty acids to remain shielded in the interior of what becomes the phospholipid bilayer.

9

The phospholipid bilayer is critically important to the separation of the internal and external environment of the cell.

What drives the formation of the phospholipid bilayer?

The external environment pushes non-polar hydrophobic fatty acid tails to form the inner layer and the polar hydrophilic head groups to form the outer layer.

The external environment pushes non-polar hydrophilic fatty acid tails to form the inner layer and the polar hydrophobic head groups to form the outer layer.

The external environment pushes non-polar hydrophilic fatty acid tails to form the inner layer and the polar hydrophilic head groups to form the outer layer.

The external environment pushes non-polar hydrophobic fatty acid tails to form the inner layer and the polar hydrophobic head groups to form the outer layer.

None of these

Explanation

The external hydrophilic environment attracts polar hydrophilic phosphate head groups to the exterior, while allowing non-polar hydrophobic fatty acids to remain shielded in the interior of what becomes the phospholipid bilayer.

10

Which organic compound serves as stored energy for living things?

Lipids

Nucleic acids

Carbohydrates

Proteins

Explanation

Lipids make up the bulk of fat in animal tissues and thus stores energy.

Page 1 of 3
Return to subject