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35 terms

Photosynthesis

STUDY
PLAY
Photorespiration lowers the efficiency of photosynthesis by removing which of the following from the Calvin cycle?
ribulose biphosphate molecules
Which of the following statements about the light reactions of photosynthesis is false?
the proton gradient is used to reduce NADP.
The primary function of the light reactions of photosynthesis is
to produce energy-rich ATP and NADPH
The reactions of the Calvin cycle require all of the following molecules except
RuBP
You have discovered a new flower speicies that has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are not being absorbed by this pigment?
red and yellow
All of the events listed below occur in the energy-capturing light reactions of photosynthesis except
CO2 is incorporated into PGA
Which of the following are products of the Calvin cycle and are utilized in the light reactions of photosynthesis?
ADP, PI, and NADP+
Where does the Calvin cycle of photosynthesis take place?
stroma of the chloroplast
Which of the following enzymes is probably the most abundant protein in the world?
RuBP carboxylase/oxygenase
In the C4 photosynthesis, carbon fixation takes place in the _______cells, and then is transferred as malic or aspartic acid to _____cells where carbon dioxide is released for entry into the Calvin cycle.
mesophyll; bundle sheath
Because of the bundle sheath cells are relatively protected from atmospheric oxygen, the level of ________is held minimum in C4 plants
photorespiration
Which of the following events in the functioning of photosystem II is false?
The P680 chlorophyll donates a pair of protons to NADPH, which is thus converted to NADP+
On which of the following features do most plant and animal cells differ?
primary energy source
Which of the following is not true of riboluse biphosphate carboxylase
It catalyzes a phosphorylation reaction
In a plant cell, where is the ATP synthase located?
thylakoid membrane and inner mitochondrial membrane
All of the following statements are correct regarding the Calvin cycle of photosynthesis except
These reactions begin soon after sundown and end before sunrise
If photosynthesizing green algae are provided with CO2 synthesized with heavy oxygen (18O), later analysis will show that all but one of the following compounds produced by the algae contain the 18O label. that one exception is
O2
The process of noncyclic photophosphorylation uses light energy to synthesize
ATP and NADPH
Members of the CAM plants differ from C4 plants in that they
incorporate carbon dioxide into organic acids at night
Which of the following is not directly associated with photosystem II
photophosphorylation
In green plants, the primary function of the Calvin cycle is to
construct simple sugars from CO2
You are a research scientist studying photosynthesis. In an experiment performed during the day, you provide a new plant, just discovered with radioactive carbon as a metabolic tracer. The tracer is incorporated first in to oxaloacetic acid. The plant is best characterized as a
C4 plant
What are the products of the light reactions that are used by the Calvin cycle?
ATP and NADPH
In the thylakoid membranes, what is the main role of the antenna pigment molecules?
to harvest photons and transfer light energy to the reaction center chlorophyll
Which of the following discovered that water is part of the photosynthesis
Jans van Helmont
Produces molecular oxygen
light reactions
forms a proton gradient
Calvin cycle
Requires ATP
Calvin cycle
Produces NADP+
neither light reaction or calvin cycle
produces NADPH
light reactions
produces glucose
Calvin cycle
In active in the dark
both calvin cycle and light reaction
requires CO2
Calvin cycle
requires glucose
neither light reaction or calvin cycle
requires ADP
light reactions