Week 8 Biology 110 Homework
Why are C3 plants so-named?Because 3PG is a three-carbon molecule
Because 3PG is a three-carbon molecule
In the light reactions, ATP is generated via:
Chemiosmosis
Similar to ATP synthesis in mitochondria _____________ ATP synthesis in chloroplasts is achieved by a(n) mechanism called photophosphorylation.
Chemiosmosis
True or false: The term "C3" was derived from the 3-carbon sugar that represents the end product of photosynthesis.
False
What happens during photorespiration?
Rubisco attaches O2 to RuBP, and CO2 is produced.
In C4 plants, the first product of carbon fixation is:
a four-carbon molecule
The end product of phase 2 of the Calvin cycle is G3P This molecule is used to synthesize _____________ and to regenerate the starting material ______________ bisphosphate.
carbohydrates, ribulose
Similar to ATP synthesis in mitochondria, ATP synthesis in chloroplasts is achieved by a(n) _________ mechanism called photophosphorylation.
chemiosmosis
When the level of NADP+ is low, electron flow is favored ___________while when NADP+ levels are high __________ electron flow is favored.
cyclic, noncyclic
The flow of electrons from PSII to PSI is considered to be:
linear electron flow
Cyclic electron flow is favored when the level of NADP+ is ______, or when ATP levels are ______, while noncyclic (or linear) electron flow is favored when NADPH is ______.
low, low, low
The G3P produced at the end of the second phase of the Calvin cycle is directly used for which of the following? Select all that apply.
make glucose or other carbohydrates regenerate ribulose bisphosphate
The flow of electrons from PSII to PSI is called _____________ electron flow because electrons the electrons move linearly from PSII to PSI.
noncyclic
In hot dry conditions, rubisco can attach O2 to RuBP in a process called ______. which ultimately produces CO2.
photorespiration
The reactions of the Calvin cycle occur in the
stroma
Photosystems I and II are located in:
the thylakoid membrane
Which of the following are components of both PSI and PSII?
A light harvesting complex A reaction center
What molecule is produced by photosystem II?
Oxygen
During photosynthesis _________ serves as an electron carrier that can accept two high-energy electrons.
NADPH
During photosynthesis _____________ serves as an electron carrier that can accept two high-energy electrons.
NADPH
Which molecule is used as an electron carrier during photosynthesis?
NADPH
The electrons that exit PSII are replenished by electrons from oxidized ___________ which yields oxygen gas that can be used by plant cells or released to the environment.
H2O
The electrons that exit PSII are replenished by electrons from oxidized ____________ which yields oxygen gas that can be used by plant cells or released to the environment.
H2O
The electrons that exit PSII are replenished by electrons from oxidized ______________ , which yields oxygen gas that can be used by plant cells or released to the environment.
H2O
