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
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+
Which of the following enzymes is probably the most abundant protein in the world?
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
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+
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
Members of the CAM plants differ from C4 plants in that they
incorporate carbon dioxide into organic acids at night
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
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