1. In noncyclic photosynthetic electron transport, water is used to a. excite chlorophyll.
b. hydrolyze ATP.
c. reduce chlorophyll.
d. oxidize NADPH.
e. synthesize chlorophyll.
2. Which statement about light is true?
a. An absorption spectrum is a plot of biological effectiveness versus wavelength.
b. An absorption spectrum may be a good means of identifying a pigment.
c. Light need not be absorbed to produce a biological effect.
d. A given kind of molecule can occupy any energy level.
e. A pigment loses energy as it absorbs a photon.
3. Which statement about chlorophylls is not true?
a. They absorb light near both ends of the visible spectrum.
b. They can accept energy from other pigments, such as carotenoids.
c. Excited chlorophyll can either reduce another substance or fluoresce.
d. Excited chlorophyll may be an oxidizing agent.
e. They contain magnesium.
4. In cyclic electron transport, a. oxygen gas is released.
b. ATP is formed.
c. water donates electrons and protons.
5. Which of the following does not happen in noncyclic electron transport?
a. Oxygen gas is released.
c. Water donates electrons and protons.
e. CO2 reacts with RuBP.
6. In the chloroplasts, a. light leads to the pumping of protons out of the thylakoids.
b. ATP forms when protons are pumped into the thylakoids.
c. light causes the stroma to become more basic than the thylakoids.
d. protons return passively to the stroma through protein channels.
e. proton pumping requires ATP.
7. Which statement about the Calvin-Benson cycle is not true?
a. CO2 reacts with RuBP to form 3PG.
b. RuBP forms by the metabolism of 3PG.
c. ATP and NADPH + H+ form when 3PG is reduced.
d. The concentration of 3PG rises if the light is switched off.
e. Rubisco catalyzes the reaction of CO2 and RuBP.
b. rubisco catalyzes the first step in the pathway.
c. four-carbon acids are formed by PEP carboxylase in bundle sheath cells.
d. photosynthesis continues at lower CO2 levels than in C3 plants.
e. CO2 released from RuBP is transferred to PEP.
9. Photosynthesis in green plants occurs only during the day.
Respiration in plants occurs a. only at night.
b. only when there is enough ATP.
c. only during the day.
e. in the chloroplast after photosynthesis.
b. includes reactions carried out in peroxisomes.
c. increases the yield of photosynthesis.
d. is catalyzed by PEP carboxylase.
e. is independent of light intensity.
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.