Download Macromolecules II Wi(Re) - Honors Bio

North Star Academy College Preparatory High School
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Honors Biology
Macromolecules II Wi(Re)
1. The enzyme amylase can break glycosidic linkages between glucose monomers only if the
monomers are the α form. Which of the following could amylase break down?
a. Glycogen
b. Cellulose
c. Chitin
d. B and C, only
Explain:
2. Which of the following is true of cellulose?
a. It is a polymer composed of sucrose monomers
b. It is a storage polysaccharide for energy in plant cells
c. It is a storage polysaccharide for energy in animal cells
d. It is a major structural component of plant cell walls
North Star Academy College Preparatory High School
3. The spontaneous formation of a lipid bilayer in an aqueous environment occurs because
a. The polar head groups of the phospholipids can interact with water
b. The long fatty acid tails of the phospholipids can interact with water
c. The fatty acid tails of the phospholipids are hydrophobic
d. Both A and C are correct
4. What type of bonds joins the monomers in a protein’s primary structure?
a. Ionic
b. Hydrophobic
c. Peptide
d. Disulfide
5. What maintains the secondary structure of a protein?
a. Peptide bonds
b. Hydrogen bonds
c. Disulfide bridges
d. Ionic bonds
6. The figure depicted below shows the
a.
b.
c.
d.
1-4 linkage of the α glucose monomers of starch
1-4 linkage of the β glucose monomers of cellulose
double helical structure of a DNA molecule
α helix secondary structure of a polypeptide
North Star Academy College Preparatory High School
7. At which level of protein structure are interactions between the side chains (R groups) most
important
a. primary
b. secondary
c. tertiary
d. quaternary
8. What happens to the shape and function of a protein if one or more of the amino acids is
replaced with a different type of amino acid?
a. The protein will unravel and become entirely nonfunctional
b. It depends on the role of the amino acid that is altered. One amino acid might be
replaced with no measurable effect on the protein’s function; replacing another might
cause a total loss of function
c. The protein will remain unchanged; several amino acids would have to be altered to
have any effect on protein function
d. The protein’s fourth level structure will be damaged
Explain, citing a specific example or case study.
9. Which of the following statements is/are true regarding the chemical reaction illustrated in the
figure below?
a.
b.
c.
d.
It is a dehydration synthesis reaction
It results in a glycosidic bond
It joins two fatty acids together
A and B only
North Star Academy College Preparatory High School
10. The R group or side chain of the amino acid serine is —CH2—OH. The R group or side chain of
the amino acid alanine is —CH3. Where would you expect to find these amino acids in a globular
protein in aqueous solution?
a. Serine would be in the interior, and alanine would be on the exterior of the globular
protein
b. Alanine would be in the interior, and serine would be on the exterior of the globular
protein
c. Both serine and alanine would be in the interior of the globular protein
d. Both serine and alanine would be on the exterior of the globular protein
Explain
11. Which of the following descriptions best fits the class of molecules known as nucleotides?
a. a nitrogenous base and a phosphate group
b. a nitrogenous base and a pentose sugar
c. a nitrogenous base, a phosphate group, and a pentose sugar
d. a phosphate group and an adenine or uracil
12. The difference between the sugar in DNA and the sugar in RNA is that the sugar in DNA
a. is a six-carbon sugar and the sugar in RNA is a five-carbon sugar
b. can form a double-stranded molecule
c. has a six-membered ring of carbon and nitrogen atoms
d. contains one less oxygen atom
Explain
North Star Academy College Preparatory High School
13. Why are lipids insoluble in water?
a. The majority of their bonds are polar covalent carbon to hydrogen linkages
b. The majority of their bonds are nonpolar covalent carbon to hydrogen linkages
c. They are hydrophilic
d. They are lighter than water
14. Which of the following pairs of functional groups characterizes the structure of an amino acid?
15. Which of the following are differences between proteins and lipids?
I. Proteins contain sulfur; lipids do not
II. Proteins contain phosphate; lipids do not
III. Protein contain oxygen; lipids do not
a.
b.
c.
d.
e.
I only
II only
III only
I and II only
I, II and III