Download Goal 2.04 Quiz 1

Why is the “lock and key” analogy often used to
describe enzyme function?
A. Each enzyme is different from its substrate.
B. Each enzyme will fit with only one specific
kind of substrate.
C. Each enzyme can only be used once in a
reaction and cannot be used again.
D. Each enzyme has its own active site that will
not fit with other active sites.
If a cell has many lipids but few fatty acids, what
does this indicate?
A. The lipase is working to break down the lipids.
B. The lipase is not producing enough fatty acids.
C. The lipase is not working to break down the
lipids.
D. The lipase is not producing enough glycerols.
What part of an enzyme determines the
substrate on which the enzyme will work?
A. the substrate
B. the products
C. the active site
D. the substrate concentration
What effect would an increase in substrate
concentration have on enzyme function?
A. There would be a constant decrease in enzyme
function.
B. There would be a constant increase in enzyme
function.
C. There would be a constant increase in enzyme
function until all enzyme is used.
D. There would be a constant decrease in enzyme
function until all enzyme is used.
Which best explains why enzymes are important
in biological systems?
A. Enzymes are necessary to maintain skin
moisture.
B. Enzymes are cellular support structures.
C. Enzymes accelerate the rate of reactions.
D. Enzymes hold all genetic information of a cell.
Many people are lactose intolerant and cannot
digest dairy products. What enzyme are their
bodies most likely lacking?
A. lactase
B. Lipase
C. Maltase
D. protease
How does an enzyme speed up chemical
reactions?
A. by absorbing energy
B. by releasing energy
C. by decreasing the energy needed
D. by increasing the energy needed
Which scenario best describes enzyme action?
A. The substrate binds to the enzyme’s
activation site.
B. Enzymes increase activation energy, raising
cell temperature.
C. The activation site produces enzymes from
digested protein.
D. Enzymes raise cell temperature and pH during
metabolism.
What process uses restriction enzymes to cut
and move pieces of DNA from one bacterium to
another?
A. asexual reproduction
B. gel electrophoresis
C. genetic engineering
D. protein synthesis
Why are restriction enzymes used by
biotechnologists to cut small pieces of DNA from
larger strands?
A. Restriction enzymes cut the sugar-phosphate
backbones without damaging the nitrogen bases.
B. Restriction enzymes cut the nitrogen bases
without damaging the sugar-phosphate backbones.
C. Restriction enzymes soften the DNA so that it
can be cut with a scalpel under a microscope.
D. Restriction enzymes harden the DNA so that it
can be broken under a microscope.