Chapter Three Reading Quiz

Question 1

The level of protein structure that is the sequence of amino acids is

A. secondary
B. tertiary
C. quaternary
D. primary

Answer 1

D. primary

Question 2

Of the following polysaccharides, the only one that is NOT usable for energy by animals is

A. starches such as amylose
B. glycogen
C. cellulose

Answer 2

C. cellulose

Question 3

The chemical difference between fats and oil is that

A. fats have more fatty acids than oils
B. fats have nitrogen functional groups but oils do not
C. The fatty acids of fats are more saturated than the fatty acids of oils
D. Fats are more reactive than oils

Answer 3

C. The fatty acids of fats are more saturated than the fatty acids of oils

Question 4

The subunits of organic molecules are

A. homomers
B. singumers
C. monomers
D. unimers

Answer 4

C. monomers

Question 5

Sucrose is made of

A. 2 glucose
B. glucose and galactose
C. glucose and fructose
D. glucose and maltose

Answer 5

C. glucose and fructose

Question 6

Proteins include

A. fats, oils, and steroids
B. cellulose and chitin
C. enzymes
D. DNA, RNA, and ATP

Answer 6

C. enzymes

Question 7

Nucleic acids include

A. DNA, RNA, and ATP
B. Fats, oils, and steroids
C. enzymes
D. cellulose and chitin

Answer 7

A. DNA, RNA, and ATP

Question 8

Nonpolar and uncharged atoms and molecules are

A. hydrophobic
B. hydrophilic

Answer 8

A. hydrophobic

Question 9

A major difference between carbohydrates and lipids is that carbohydrates

A. are held together by disulfide bonds, and lipids are not
B. are generally linear while lipids generally form ring structures
C. contain phosphorus and lipids do not
D. have a ratio of H:O of about 2:1; in lipids this ratio is much higher

Answer 9

D. have a ratio of H:O of about 2:1; in lipids this ratio is much higher

Question 10

Lipids include

A. enzymes
B. cellulose and chitin
C. DNA, RNA, and ATP
D. fats, oils, and steroids

Answer 10

D. fats, oils, and steroids

Question 11

Carbohydrates include

A. DNA, RNA, and ATP
B. enzymes
C. cellulose and chitin
D. fats, oils, and steroids

Answer 11

C. cellulose and chitin

Question 12

5-carbon sugar, at least one phosphate group and a nitrogen-containing base

Answer 12

All nucleotides contain a

Question 13

The part of an organic molecule that determines its chemical characteristics is the

A. carbon backbone
B. functional groups
C. hydrogen atoms

Answer 13

B. functional groups

Question 14

Of the following polysaccharides, the only one that is NOT usable for energy by animals is

A. cellulose
B. starches such as amylose
C. glycogen

Answer 14

A. cellulose

Question 15

The only carbohydrate that contains nitrogen is

A.  glycogen 
B. amylose 
C. chitin 
D. sucrose 
E. cellulose

Answer 15

C. chitin

Question 16

The physical difference between fats and oils is that

A. fats store more calories per gram than oils
B. Fats are solid at room temperature; oils are liquid
C. fats are liquid at room temperature; oils are solid
D. fats are more reactive than oils

Answer 16

C. fats are liquid at room temperature; oils are solid

Question 17

Proteins that move molecules and ions across cell membranes are

A. structural proteins
B. transport proteins
C. enzymes
D. nutrient storage proteins

Answer 17

B. transport proteins

Question 18

In hydrolysis,

A. one organic molecule is split apart, and water is removed
B. two organic molecules form a covalent bond, and water is added
C. two organic molecules form a covalent bond, and water is removed
D. one organic molecule is split apart, and water is added

Answer 18

C. two organic molecules form a covalent bond, and water is removed

Question 19

Lactose is made of

A. glucose and fructose
B. 2 glucose
C. glucose and galactose
D. glucose and maltose

Answer 19

C. glucose and galactose

Question 20

A characteristic shared by many organic molecules is

A. one or more hydroxyl groups
B. a carbon backbone
C. several nitrogen atoms
D. one or more oxygen atoms

Answer 20

B. a carbon backbone

Question 21

Disulfide (sulfur to sulfur) bonds help maintain a protein’s

A. linear structure
B. planar structure
C. 3-D structure

Answer 21

C. 3-D structure

Question 22

Cholesterol is a lipid belonging to the category of

A. waxes
B. fats
C. oils
D. steroids

Answer 22

D. steroids