FULL 123 QUESTIONS WITH VERIFIED
ANSWERS GRADED A PLUS.
◎ How is photosynthesis similar in C4 plants and CAM plants? ANSWER:- both types
of plants use PEP-carboxylase and Rubisco to "x CO2
◎ Which of the following sequences is the closest representation of the flow of
electrons during non-cyclic photosynthesis? ANSWER:- H2O --> photosynthetcic
electron transfer chain --> NADPH
◎ Theodor W. Engelmann illuminated a "lament of algae with light that passed through
a prism, thus exposing different segments of algal filament to different wavelengths of
light. He added aerobic bacteria and then noted in areas in which the bacteria
congregated. He noted that the largest groups of aerobic bacteria were found in the
areas illuminated by the red and blue light. What might be the best conclusion
Engelmann could make about the congregation of bacteria in the red and blue areas?
ANSWER:- bacteria congregated in these areas because these areas pduced more
oxygen via photosynthesis in the algae
◎ Compared to C3 plants, C4 plants? ANSWER:- C4's can continue to fix CO2 even at
relatively low CO2 concentrations and high oxygen concentrations.
◎ As a plant physiology researcher, you measure the amount of ATP and NADPH
consumed by the Calvin cycle in 1 hour in tobacco plants. You observe 30,000
molecules of
ATP are consumed, but only 20,000 molecules of NADPH are consumed. Which of the
following processes is likely to have produced the addiitonal 10,000 molecules of ATP
ANSWER:- cyclic electron flow
◎ A flask containing photosynthetic green algae and a control flask containing water
with no algae are both placed under a bank of lights, which are set to cycle between 12
hours of light and 12 hours of dark. The dissolved oxygen concentrations in both flasks
are monitored. Predict what the relative dissolved oxygen concentrations will be in
the flask with algae compared to the control flask. ANSWER:- the dissolved oxygen in
the flask with algae will be higher in the light, but lower in the dark
◎ The drug cytochalasin B blocks the assembly of G-actin subunits. Which of the
following aspects of the cell cycle would most likely be disrupted by cytochalasin B?
ANSWER:- cleavage furrow formation and cytokinesis during cell division