Georgia Tech School of Biology
Q: If cytoplasmic ATP concentration is high,
and the extracellular H+ concentration is low,
then
a) ATP synthase will synthesize ATP at a slower rate
b) ATP synthase will synthesize ATP at a faster rate
c) ATP synthase will hydrolyze ATP and pump
protons out of the cell
d) ATP synthase will hydrolyze ATP and pump
protons into the cell
Biol 1510
Fall 2011
Georgia Tech School of Biology
When a marshmallow catches fire and
burns (C6H12O6 + 6O2  6CO2 + 6 H2O),
a)
b)
c)
d)
e)
Biol 1510
The carbon atoms of sugar are reduced
The hydrogen atoms of sugar are reduced
Molecular oxygen is reduced
All of the above
None of the above
Fall 2011
Georgia Tech School of Biology
Heating the marshmallow
a) Made the G of the glucose oxidation
reaction more negative
b) Lowered the activation energy barrier for
the glucose oxidation reaction
c) Acted as a catalyst for the glucose
oxidation reaction
d) Provided the activation energy required for
the glucose oxidation reaction
Biology
1510
Biol
1510
Fall 2011
Georgia Tech School of Biology
In cells, the pathway of electrons is
a) From food to the electron transport chain to
NAD+ to oxygen
b) From oxygen to the electron transport chain to
NAD+ to food.
c) From food to NAD+ to the electron transport
chain to ATP synthase
d) From food to NAD+ to the electron transport
chain to the terminal electron acceptor
e) From food to NAD+ to the electron transport
chain to ADP
Biol 1510
Fall 2011
Georgia Tech School of Biology
Q: An organism that gets electrons from H2 and
makes its own organic carbon from carbon
dioxide is classified as a:
a)
b)
c)
d)
Biol 1510
Chemoheterotroph
Chemoautotroph
Photoheterotroph
Photoautotroph
Fall 2011
Georgia Tech School of Biology
Q: Which of the following would NOT have been a
possible energy-harvesting pathway for the LUCA?
a. Organic molecules as electron donor, sulfate as
electron acceptor
b. Organic molecules as electron donor, oxygen as
electron acceptor
c. H2 as electron donor, Fe+3 as electron acceptor
Biol 1510
Fall 2011
Georgia Tech School of Biology
Q: Oxidative phosphorylation occurs in
a) All cells in the presence of oxygen
b) Only in mitochondria in the presence of oxygen
c) Only in mitochondria, using either oxygen or
alternative electron acceptors
d) All respiring cells, using either oxygen or
alternative electron acceptors
e) All respiring cells, except Archaea
Biol 1510
Fall 2011
Georgia Tech School of Biology
Microbial fuel cells – bioelectrical energy
Oxic zone
Anoxic layer
Biol 1510
Fall 2011
Georgia Tech School of Biology
What metabolic processes are microbes at the
anode using to make most of their ATP?
a)
b)
c)
d)
e)
Aerobic respiration
Oxidative phosphorylation
Anaerobic respiration
Both a) and b)
Both b) and c)
Biology
1510
Biol
1510
Fall 2011
Georgia Tech School of Biology
What is the ultimate source of the electrons
collected by the anode?
a) Organic molecules used as food by the
bacteria
b) Water
c) Oxygen
d) Carbon dioxide
Biol 1510
Fall 2011
Georgia Tech School of Biology
The electron transport chain in bacteria
is located
a)
b)
c)
d)
e)
Biol 1510
In their mitochondrial inner membranes
In their mitochondrial outer membranes
On their plasma membranes
In the cytoplasm
In the nucleoid
Fall 2011
Georgia Tech School of Biology
Which reagents added to the mud around the
anode would boost electricity output?
a) Oxygen
b) More organic food molecules
c) More terminal electron acceptors such as
sulfate
d) More protons (lower pH)
e) A microbicide (antibiotic)
Biol 1510
Fall 2011
Georgia Tech School of Biology
Can eukaryotic cells generate electric current
in this kind of microbial fuel cell?
Biol 1510
Fall 2011