Exam 3 (ch. 9,10,11) quiz questions
chlorophyll absorbs light most strongly in what region of the electromagnetic spectrum
red and blue wavelengths
Where is ETC of photosynthesis located
thylakoid membrane
Which of the following conditions favors photorespiration?
Hot, dry environment
What is the primary function of stomates
gas exchange
During which phase of photosynthesis is ATP and NADPH synthesized
light dependent phase
At night, CAM plants incorporate CO2 into ____, which is stored in the ____ of their cells.
malate; vacuoles
In C4 plants, reactions that fix CO2 into four-carbon compounds occur in what type of cells?
mesophyll cells
where are chloroplasts found in greatest density?
palisade and spongy mesophyll
In the C4 pathway, what happens to the CO2 formed when malate is decarboxylated in bundle-sheath cells?
It enters the Calvin Cycle
Which of the following statements about an antenna complex is TRUE? A) it contains only accessory pigments B) It "funnels" energy to the reaction center. C) It converts light energy into chemical energy. D) It occurs outside the photosystem
B) It "funnels" energy to the reaction center.
Rubisco can use ______ or CO2 as a substrate.
Oxygen
First step in Calvin Cycle
carbon dioxide attaches to RuBP
During the reactions of photosynthesis, ____ is reduced and ____ is oxidized.
carbon dioxide; water
Which of the following are accessory photosynthetic pigments that expand the spectrum of light to provide energy for photosynthesis?
carotenoids and chlorophyll b
What color does chlorophyll reflect?
green
ATP is formed when ____ the thylakoid lumen.
hydrogen ions leave
An electron absorbs a photon of light energy and becomes energized; the electron shifts from a ____ atomic orbital to a __________ atomic orbital.
lower energy; higher energy
Which part of chloroplast do the carbon fixation reactions take place
stroma
In what part of a chloroplast are chlorophyll and accessory photosynthetic pigments associated?
thylakoid membranes
The O2 evolved in photosynthesis comes from
water
