Week 6 Practice Quiz

Question 0

Each amino acid differs from another in the:
A) number of central carbon atoms
B) size of the amino group
C) number of carboxyl groups
D) nature of the R group
E) number of peptide bonds in the molecule

Answer 0

D) nature of the R group

Question 1

Peptide bonds join together molecules of:
A) glycerol
B) glucose
C) amino acids
D) water
E) oxygen

Answer 1

C) amino acids

Question 2

Glycoproteins and proteoglycans are combinations of proteins and
A) carbohydrates
B) fatty acids
C) lipids
D) nucleic acids
E) none of the above

Answer 2

A) carbohydrates

Question 3

The building blocks of proteins are
A) triglycerides
B) phospholipids
C) amino acids
D) monosaccharides
E) eicosanoids

Answer 3

C) amino acids

Question 4

Proteins
A) are the body’s source of immediate energy
B) are the building blocks of nucleotides
C) provide much of the structure of body cells and tissue
D) contain the genetic information of the cell
E) insulate and cushion the body

Answer 4

C) provide much of the structure of body cells and tissues

Question 5

Adjacent amino acids in a polypeptide chain are held together by
A) hydrogen bonds
B) ionic bonds
C) van der waals bonds
D) peptide bonds
E) high energy bonds

Answer 5

D) peptide bonds

Question 6

The enzyme lactase catalysers the chemical reaction that changes lactose to:
A) glucose only
B) glucose and fructose
C) fructose and galactose
D) glucose and galactose
E) alcohol

Answer 6

D) glucose and galactose

Question 7

Proteins are composed of \_\_\_\_\_\_\_ commonly occurring amino acids
A) 10
B) 18
C) 20
D) 22
E) 50

Answer 7

C) 20

Question 8

Amino acids frequently become joined by:
A) peptide bonds
B) catabolic reactions
C) strophic reactions
D) Newton bonds
E) all of the above

Answer 8

A) peptide bonds

Question 9

Which of the following is not a function of protein?
A) provides structure for the body
B) acts as a catalyst for chemical reactions
C) provides energy for the body
D) all of the above are functions of protein

Answer 9

D) all of the above are functions of protein

Question 10

Which level of protein structure refers to the number, kind, and sequence of amino acids.
A) primary
B) secondary
C) tertiary
D) quaternary

Answer 10

A) primary

Question 11

Which level of protein structure is one that contains several polypeptide chains.
A) primary
B) secondary
C) tertiary
D) quaternary

Answer 11

D) quaternary

Question 12

The function of a catalyst is to:
A) convert strong acids and bases into weak acids and bases
B) store energy released during exergonic reactions
C) act as the chemical link between atoms in a covalent bond
D) lower the activation energy needed for a chemical reaction to occur
E) keep particles in a colloid from settling out

Answer 12

D) lower the activation energy needed for a chemical reaction to occur

Question 13

Which of the following is true of a catalyst?
A) it is changed by the chemical reaction in which it participates
B) it helps orient colliding molecules so that a reaction is more likely to occur
C) it raises the activation energy required for a reaction to occur
D) it prevents chemical reactions from occurring under physiological conditions
E) it changes the difference in protein energy between reactants and products

Answer 13

B) it helps orient colliding molecules so that a reaction is more likely to occur

Question 14

Enzymes are
A) biological catalysts
B) usually large proteins
C) specific for a single substrate
D) A and B are true
E) A, B and C are true

Answer 14

E) A, B and C are true

Question 15

Enzymes and antibodies are examples of
A) carbohydrates
B) lipids
C) amino acids
D) nucleic acids
E) proteins

Answer 15

E) proteins

Question 16

ALL of the following are organic molecules EXCEPT:
A) ATP
B) glucose
C) DNA
D) enzymes
E) O2

Answer 16

E) O2

Question 17

In proteins, the folding of the unit on itself is referred to its
A) primary structure
B) secondary structure
C) tertiary structure
D) quaternary structure
E) all answers are correct

Answer 17

C) tertiary structure

Question 18

The particular sequence of amino acids found in a protein is its ______ structure

Answer 18

Primary

Question 19

_________ metals have a toxic effect on the body by denaturing proteins

Answer 19

Heavy

Question 20

___________ control the rate of chemical reactions that occur in the human body

Answer 20

Enzymes

Question 21

__________ molecules are compounds that contain carbon as the primary structural atom

Answer 21

Organic

Question 22

The branch of biological science that deals with the external and internal structure of body parts and their physical relationships is called ______________.

Answer 22

Anatomy