Bioc 385 Final Exam questions well
answered already passed
The term greenhouse effect refers to the idea that - correct answer ✔✔the temperature of the
earth is increasing because of heat trapped by gases such as CO2.
What is the overall reaction for the Calvin cycle, or dark reactions? - correct answer
✔✔3CO2+9ATP+6NADPH+6H2O-> G3P+9ADP+6NADP+9Pi
What is the overall balanced reaction for the light reactions of photosynthesis? - correct answer
✔✔2 H2O + 8 photons + 2 NADP+ + 3 ADP + 3 Pi --> O2 + 2 NADPH + 3 ATP
For photosynthesis, sunlight energy drives electron transfer. Where are the electrons ejected
from when light is absorbed? - correct answer ✔✔light-harvesting pigments in PSI and PSII
Resonance energy transfer from one chlorophyll in the photosystems results in - correct answer
✔✔a neighboring chlorophyll in an excited state.
Which enzyme in the photosynthetic Z scheme catalyzes the PQ cycle, which is analogous to
Complex III and the Q cycle in the mitochondrial electron transport chain? - correct answer
✔✔cytochrome b6f
Which electron carrier molecule in the photosynthetic electron transport chain is largely
hydrophobic and found floating in the thylakoid membrane? - correct answer ✔✔plastoquinone
In addition to the pumping of protons with the photosynthetic electron transport, what else
contributes to establishing a proton gradient? - correct answer ✔✔the formation of O2 from
two H2O
,The primary difference between ATP synthesis during the photosynthetic light reactions and ATP
synthesis in the mitochondrial electron transport chain is the - correct answer ✔✔cellular
location of the proton motive force.
The energy derived from photosynthesis and used to make ATP is manifested in what form? -
correct answer ✔✔an acidic thylakoid lumen
What is a reason for keeping photosystem I (PSI) and photosystem II (PSII) separate in the
chloroplasts? - correct answer ✔✔They would quench each other by energy transfer.
The Calvin cycle requires which species from the light reactions? - correct answer ✔✔ATP and
NADPH
Why are Calvin cycle reactions also referred to as the dark reactions? - correct answer ✔✔They
do not absorb sunlight energy
Overall, the net balanced reaction of the Calvin cycle converts 3 CO2 into one - correct answer
✔✔glyceraldehyde-3-phosphate.
Which of the following is true of stage 2 of the Calvin cycle? - correct answer ✔✔Almost all of
the NADPH and ATP from the light reactions are used in stage 2.
Under what condition(s) do the wasteful side reaction of O2 with rubisco become significant? -
correct answer ✔✔increased temperature and intense light
In C3 plants CO2 is first incorporated into __________, whereas in C4 and CAM plants the CO2 is
first incorporated into __________. - correct answer ✔✔3-phosphoglycerate; oxaloacetate
, Unlike plant cells, animal cells lack the glyoxylate enzymes - correct answer ✔✔isocitrate lyase
and malate synthase
Which simple sugar major group ranges in size from 3 to 20 branched and unbranched sugar
residues? - correct answer ✔✔oligosaccharides
Which glucose homopolymer is generated during daylight hours in plants? - correct answer
✔✔starch
Glycoconjugates are linked to proteins or lipids via - correct answer ✔✔covalent bonds
Which of the following oligosaccharides are found in high abundance in some types of
vegetables and have been known to cause intestinal distress? - correct answer ✔✔verbascose
Eating large amounts of vegetables can cause flatulence because of the presence of - correct
answer ✔✔raffinose
The structure of raffinose, stachyose, and verbascose differ in the number of __________ units
attached to a __________. - correct answer ✔✔galactose; sucrose
How are glycosaminoglycans attached to proteins? - correct answer ✔✔covalent bonds
Which glycan contains both α-1,4 glycosidic bonds and α-1,6 glycosidic bonds? - correct answer
✔✔amylopectin
Amylose can form stable left-handed helical structures because of - correct answer
✔✔hydrogen bonds.
answered already passed
The term greenhouse effect refers to the idea that - correct answer ✔✔the temperature of the
earth is increasing because of heat trapped by gases such as CO2.
What is the overall reaction for the Calvin cycle, or dark reactions? - correct answer
✔✔3CO2+9ATP+6NADPH+6H2O-> G3P+9ADP+6NADP+9Pi
What is the overall balanced reaction for the light reactions of photosynthesis? - correct answer
✔✔2 H2O + 8 photons + 2 NADP+ + 3 ADP + 3 Pi --> O2 + 2 NADPH + 3 ATP
For photosynthesis, sunlight energy drives electron transfer. Where are the electrons ejected
from when light is absorbed? - correct answer ✔✔light-harvesting pigments in PSI and PSII
Resonance energy transfer from one chlorophyll in the photosystems results in - correct answer
✔✔a neighboring chlorophyll in an excited state.
Which enzyme in the photosynthetic Z scheme catalyzes the PQ cycle, which is analogous to
Complex III and the Q cycle in the mitochondrial electron transport chain? - correct answer
✔✔cytochrome b6f
Which electron carrier molecule in the photosynthetic electron transport chain is largely
hydrophobic and found floating in the thylakoid membrane? - correct answer ✔✔plastoquinone
In addition to the pumping of protons with the photosynthetic electron transport, what else
contributes to establishing a proton gradient? - correct answer ✔✔the formation of O2 from
two H2O
,The primary difference between ATP synthesis during the photosynthetic light reactions and ATP
synthesis in the mitochondrial electron transport chain is the - correct answer ✔✔cellular
location of the proton motive force.
The energy derived from photosynthesis and used to make ATP is manifested in what form? -
correct answer ✔✔an acidic thylakoid lumen
What is a reason for keeping photosystem I (PSI) and photosystem II (PSII) separate in the
chloroplasts? - correct answer ✔✔They would quench each other by energy transfer.
The Calvin cycle requires which species from the light reactions? - correct answer ✔✔ATP and
NADPH
Why are Calvin cycle reactions also referred to as the dark reactions? - correct answer ✔✔They
do not absorb sunlight energy
Overall, the net balanced reaction of the Calvin cycle converts 3 CO2 into one - correct answer
✔✔glyceraldehyde-3-phosphate.
Which of the following is true of stage 2 of the Calvin cycle? - correct answer ✔✔Almost all of
the NADPH and ATP from the light reactions are used in stage 2.
Under what condition(s) do the wasteful side reaction of O2 with rubisco become significant? -
correct answer ✔✔increased temperature and intense light
In C3 plants CO2 is first incorporated into __________, whereas in C4 and CAM plants the CO2 is
first incorporated into __________. - correct answer ✔✔3-phosphoglycerate; oxaloacetate
, Unlike plant cells, animal cells lack the glyoxylate enzymes - correct answer ✔✔isocitrate lyase
and malate synthase
Which simple sugar major group ranges in size from 3 to 20 branched and unbranched sugar
residues? - correct answer ✔✔oligosaccharides
Which glucose homopolymer is generated during daylight hours in plants? - correct answer
✔✔starch
Glycoconjugates are linked to proteins or lipids via - correct answer ✔✔covalent bonds
Which of the following oligosaccharides are found in high abundance in some types of
vegetables and have been known to cause intestinal distress? - correct answer ✔✔verbascose
Eating large amounts of vegetables can cause flatulence because of the presence of - correct
answer ✔✔raffinose
The structure of raffinose, stachyose, and verbascose differ in the number of __________ units
attached to a __________. - correct answer ✔✔galactose; sucrose
How are glycosaminoglycans attached to proteins? - correct answer ✔✔covalent bonds
Which glycan contains both α-1,4 glycosidic bonds and α-1,6 glycosidic bonds? - correct answer
✔✔amylopectin
Amylose can form stable left-handed helical structures because of - correct answer
✔✔hydrogen bonds.
