Deck 3: The Macromolecules of the Cell

Question 1

Which of the following has the greatest number of glycosidic bonds?

A)glucose
B)DNA
C)amylose
D)vitamin A
E)triacylglycerol

Answer 1

C

Question 2

Which of the following is a terpene?

A)testosterone
B)dolichol
C)glycerol
D)phenanthrene
E)vitamin A

Answer 2

B

Question 3

Which of the following is a disaccharide?

A)lactose
B)fructose
C)galactose
D)glucose
E)amylose

Answer 3

A

Question 4

Which of the following is true of purines?

A)Adenine's bonding to thymine is stronger than is guanine's to cytosine.
B)Cytosine is a purine.
C)Purines have a double- ringed structure.
D)Purines bind readily to deoxyribose, but not ribose.
E)Both adenine and thymine are purines.

Question 5

Which of the following is most similar to the Watson- Crick helix?

A)mRNA
B)Z- DNA
C)B- DNA
D)A- DNA
E)C- DNA

Question 6

Hydrogen bonding is most important in stabilizing the structure of many proteins.

A)tertiary
B)quaternary
C)primary
D)secondary
E)all of the above

Question 7

Which of the following amino acids is a nonpolar (hydrophobic)amino acid?

A)tyrosine
B)aspartate
C)serine
D)lysine
E)valine

Question 8

Which of the following is an example of a defensive protein?

A)cell surface receptor
B)keratin
C)antibody
D)hormone
E)myosin

Question 9

Which of the following is NOT a characteristic of DNA?

A)antiparallel
B)double- stranded
C)complementary
D)contains ribose
E)composed of nucleotides

Question 10

Disulfide bonds are often found to stabilize which of the following levels of protein structure?

A)tertiary
B)primary
C)secondary
D)all of the above
E)none of the above

Question 11

Which of the following is NOT correctly matched?

A)enzymatic protein - collagen
B)hormonal protein - insulin
C)storage protein - seed proteins
D)defense protein - antibody
E)motility proteins - actin and myosin

Question 12

Which of the following is NOT a major functional class of proteins?

A)structural
B)regulatory
C)enzymes
D)trifunctional
E)motility

Question 13

Which of the following three- letter symbols represents an amino acid that is a polar and uncharged?

A)ala
B)pro
C)his
D)gln
E)asp

Question 14

Based on the following amino acid sequence, which region(s)is/are hydrophobic? 1[K- K- N- Q] - 2[A- G- G- V] - 3[Y- C- S- R] - 4[H- E- C- Y]

A)region 2
B)region 4
C)region 1
D)region 3
E)Both regions 1 and 3

Question 15

Which of the following is true of fatty acids?

A)Fatty acids are synthesized by the stepwise addition of three carbon units.
B)Saturated fatty acids have no double bonds between carbons.
C)Unsaturated fatty acids are usually branched.
D)Laurate is an unsaturated fatty acid.
E)Fatty acids with 24 carbons are most common.

Question 16

Which of the following is NOT true of phospholipids?

A)Phospholipids are important in membrane structure.
B)Phosphatidic acid contains two fatty acids and a phosphate group.
C)Serine is a molecule that may be part of a phosphoglyceride.
D)Sphingolipids are the predominant phospholipid in membranes.
E)Phospholipids are amphipathic.

Question 17

Which of the following is true of transfer RNA?

A)It is an important component of ribosomes.
B)It serves as the site of protein synthesis.
C)It is responsible for correct positioning of amino acids in a polypeptide.
D)It functions in replication only.
E)It is responsible for the correct positioning of amino acids in a nascent polypeptide.

Question 18

Which of the following is NOT a steroid?

A)aldosterone
B)testosterone
C)estradiol
D)epinephrine
E)cortisol

Question 19

Which of the following is NOT a polysaccharide?

A)chitin
B)extensin
C)starch
D)cellulose
E)glycogen

Question 20

Which of the following statements is NOT true of the amino acids?

A)The R group of amino acids differs from one amino acid to another.
B)There are more than 60 different kinds of amino acids present in cells.
C)Amino acids have an N- terminus, C- terminus, and R groups.
D)All amino acids exist in two stereoisomeric forms.
E)Only around 20 amino acids are used in protein synthesis.

Question 21

Structurally, starch exists as both unbranched polysaccharide chains called and branched polysaccharide chains called .

Question 22

Which of the following is NOT a base used in DNA replication?

A)guanine
B)cytosine
C)uracil
D)thymine
E)adenine

Question 23

The level of protein structure that is even higher than quaternary structure is

A)the linear sequence of amino acids.
B)subunit interactions and assembly.
C)hydrogen bond formation.
D)enzyme complex formation.
E)R- group interactions.

Question 24

Cellulose belongs to which of the following groups of macromolecules?

A)carbohydrates
B)proteins
C)lipids
D)nucleic acids
E)none of the above

Question 25

The primary structure of a protein

A)is important for determining the secondary and tertiary structure of a protein.
B)is important both genetically and structurally.
C)is the linear sequence of amino acids that are linked together by peptide bonds.
D)is simply the order of amino acids from one end of the protein to another.
E)all of the above

Question 26

Which of the following is NOT a polymer of numerous monomer units?

A)proteins
B)carbohydrates
C)lipids
D)starch
E)nucleic acids

Question 27

To which of the following classes of sugars does glucose belong?

A)hexose
B)tetrose
C)heptose
D)triose
E)pentose

Question 28

Which of the following does NOT represent the correct pairing of the three- letter abbreviation with the one- letter abbreviation of an amino acid?

A)Phe- F
B)Pro- P
C)Arg- A
D)Met- M
E)Glu- E

Question 29

Which of the following is NOT one of the six classes of lipids?

A)steroids
B)fatty acids
C)terpenes
D)pectins
E)triacylglycerols

Question 30

Which of the following is true of glycolipids?

A)Glycolipids are usually found on the exterior surface of the plasma membrane.
B)Usually more than 10 sugar units are attached to the glycolipid.
C)Laurate is a glycolipid.
D)Fructose and sucrose are often part of glycolipids.
E)Glycolipids contain phosphatidic acid.

Question 31

The term amphipathic describes the characteristic of some molecules that have .

A)only a single polar region
B)both a polar and a nonpolar region
C)two nonpolar regions
D)two polar regions
E)no polar regions