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UNIT 4
Questions 18 - 22
These questions are about ATP synthase, the
enzyme complex which synthesises ATP
Question 18
ATP synthase is
termed an enzyme complex because
A It is made up of many
polypeptide chains
B It is embedded in a membrane
C It
catalyses more than one reaction
D It is made up of F1 and F0
sub-units
Question 19
The R groups of the amino acids
lining the proton channel are likely to be
A Hydrophobic in
nature
B Hydrophilic in nature
C Capable of forming ionic
bonds
D Non-polar in nature
Question 20
ATP
synthase molecules in human cells
A Have different polypeptide
chains than those in bacteria
B Have identical polypeptide chains
than those in bacteria
C Are encoded by a different set of genes to
those in bacteria
D Are encoded by genes which show some homology
with those in bacteria
Question 21
Protons enter the
inter-membranal space. To do so, they cross the inner mitochondrial membrane
A By diffusion
B By osmosis
C By active
transport
D By facilitated diffusion
Question 22
During anaerobic respiration ATP synthase
A Functions at
a much reduced level
B Is down regulated
C Does not
function due to an absence of oxygen
D Does not function due to an
absence of NADH
SECTION
ANSWERS
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