Enzymes

Level: Grade 12
1. Is an enzyme generally a miniscule or a large protein?

2. It is possible for a single enzyme molecule to perform its entire function a million times in a minute.
TrueFalse

3. Co-enzymes . . .
will not include vitamins
are loosely bound to the enzyme
are tightly bound to the enzyme
will include most vitamins
transfer atoms or groups of atoms
are organic substances
4. An enzyme is a chemical agent that changes the rate of a biochemical reaction without being consumed by the reaction.
Partially true
True
False
5. Every enzyme acts . . .
on the substrate that is the closest
to form hundreds of different bonds
specifically on a particular substrate
to form a particular kind of bond
6. Enzymes . . .
can become dormant without reason
are biological catalysts
control when chemical reactions should take place and when not
are essential for speeding up needed biochemical reactions
enable cells to have a dynamic metabolism
can impede reactions
play a very subordinate role to spontaneous reaction
are proteins
have an impact outside of a cell but not within a cell
7. The enzyme lipase, that breaks down fats, is produced in . . .
the liver
plants
the liver but nowhere else
animals but not plants
the pancreas
the stomach
the digestive parts of animals but not in plants
8. Enzymes accelerate the chemical reaction at least a million times.
TrueFalse

9. The study of enzymes is called enzymology.
TrueFalse

10. An enzyme . . .
is a chemical, not a protein
will act only on a specific substrate and not on any other
has no one particular shape
requires a specific biochemical reaction to function as a catalyst
is produced by living cells
functions as an organic catalyst
cannot induce a chemical reaction
is useful to life but not very necessary
is a protein
11. Are those digestive enzymes that work in the gut,...
intracellular
extracellular
12. Do enzymes exhibit . . .
hardly any catalytic power
zero catalytic power
moderate catalytic power
enormous catalytic power
13. The human body contains the following number of different enzymes . . .
>2500
>1 000
>10
>100
>500
>5000
14. For an enzyme to combine with a substrate, the shape of the enzyme and the substrate . . .
must complement each other
must be varied and different
must be square and regular
must be such that the substrate is an exact replica of the enzyme
15. Enzymes speed up chemical reactions in
all animals and only in certain plants
both plants and animals
animals alone
plants alone

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