2.2.3 Enzymes FMQuiz Homework Solution
Q. What is meant by the term metabolism?
A. All the chemical reactions in living cells
Q. In relation to an enzyme, explain the term
optimum activity.
A. Working at maximum rate
Q. For what is ATP an abbreviation?
A. Adenosine Triphosphate
Q. Explain the term bioprocessing.
A. Using micro-organisms or enzymes to make
product(s)
Q. To which group of molecules do enzymes
belong?
A. Proteins
Q. In an experiment that you carried out to
investigate the effect of pH on the rate of enzyme
action, explain how you varied the pH.
A. Used buffers
Q. What is a bioreactor?
A. A Vessel in which products are made by cells or
organisms.
Q. Name the compound from which the
immobilising beads are formed in the laboratory.
A. Sodium alginate
Q. In an experiment to investigate the effect of
temperature on the rate of action of an enzyme,
how did you vary the temperature?
A. Water bath or ice or thermostat
Q. What is meant by an enzyme?
A. Organic protein catalyst
Q. In an expt. to investigate the effect of temp on
the rate of action of an enzyme, how did you
measure the rate of the enzyme’s action?
A. By the volume of suds produced
Q. What is meant by immobilisation?
A. Enzyme trapped in beads or gel so that it will
react with, but not mix with, its substrate
Q. What name is given to the substance that an
enzyme acts on?
A. Substrate
Q. Name a factor that influences the activity of an
enzyme.
A. Temperature or pH
Q. True or False. Immobilised enzymes can act as
catalysts.
A. TRUE
Q. State one advantage of using an immobilised
enzyme in a bioreactor.
A. Enzyme can be recovered
Q. Comment on the shape of enzyme molecules.
A. Fits substrate / active site / folded /can change
shape
Q. Name a substance that is used to immobilise
enzymes.
A. Sodium alginate
Q. The action of amylase on starch is a catabolic
reaction. Explain the underlined term.
A. Breakdown of large molecules into smaller ones
Q. State a use for Buffer solution in the biology
laboratory.
A. To keep pH constant
Q. Suggest one reason why enzymes are not found
in body soap or shampoo.
A. May damage skin
Q. Apart from C, H and O, there is one other
element always present in the building blocks of
enzymes. Name that element.
A. Nitrogen
Q. Distinguish between Enzymes and Hormones
A. A catalyst and a chemical messenger
Q. Give the term for the substance that results
from the action of an enzyme on its substrate.
A. Product
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