Biology, Eighth Edition (Raven)

Chapter 8: Photosynthesis

Post Test

Which analogy best fits the concept of a "photosystem"? (p. 145)
A)An "up" escalator beside a "down" escalator.
B)A windmill that harnesses the energy from moving air to turn a wheel.
C)A basketball team which passes the ball to a well-positioned player, who can then gain points for the team.
D)The sound that comes from a compact disc.
E)A contraption which converts sound into the physical movement of a mechanical arm, which then pushes a button.
Which isotope was instrumental in determining that water is split during light reactions? (p. 147)
E)Two of the above isotopes were valuable for that information
The analysis of bacterial density growing in a spectrum of light separated with a prism onto an algal filament can allow us to create an action spectrum of photosynthesis. In this experiment, the amount of photosynthesis that can occur with different colors of light is measured because the bacteria (p. 148)
A)Are attracted to oxygen released from the algae as it photosynthesizes
B)Migrate to areas with high sugar due to photosynthetic efficiency
C)Prefer areas that have less light
D)Help the plant through endosymbiotic assistance
E)Provide shade which converts the light into "particles" which are more easily handled by the algae's pigments
Of the molecules in this list, which is the ultimate origin (donor) of electrons that are passed along through activities in the reaction centre. (p. 152)
Which ATP-generating event in photosynthesis is most similar to the one found in mitochondria? (p. 155)
A)Oxidation of organic molecules
C)Pumping of protons from one side of a membrane to another
D)Absorption of high-energy photons
E)Use of oxygen to thermodynamically drive an exergonic reaction.
The enzyme responsible for fixation of CO2 (and which, interestingly, is also the most abundant enzyme on Earth!) is called (p. 158)
A)Ribulose decarboxylase
B)Ribulose bisphosphate
C)Ribulose catalase
D)Ribulose bisphosphate decarboxylase
E)Ribulose bisphosphate carboxylase
CAM plants use a(n) ________ method to avoid photorespiration while C4 plants use a(n) __________ separation of ribulose bisphosphate carboxylase and oxygen. (p. 161)
A)Spatial (anatomy-based) - isomer-based
B)Temporal (time-based) - organic
C)Temporal - spatial
D)Spatial - temporal
E)Organic - isomer-based
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