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9 Cards in this Set

  • Front
  • Back
The light reactions of photosynthesis supply the Calvin cycle with



light energy.


CO2 and ATP.


ATP and NADPH.


H2O and NADPH.


sugar and O2.

ATP and NADPH.
Which of the following sequences correctly represents the flow of electrons during photosynthesis?



H2O → photosystem I → photosystem II


H2O → NADPH → Calvin cycle


NADPH → electron transport chain → O2


NADPH → chlorophyll → Calvin cycle


NADPH → O2 → CO2

H2O → NADPH → Calvin cycle

How is photosynthesis similar in C4 plants and CAM plants?




In both cases, rubisco is not used to fix carbon initially.


Both types of plants make sugar without the Calvin cycle.


In both cases, thylakoids are not involved in photosynthesis.


In both cases, only photosystem I is used.


Both types of plants make most of their sugar in the dark.

In both cases, rubisco is not used to fix carbon initially

Which of the following does not occur during the Calvin cycle?




oxidation of NADPH


carbon fixation


consumption of ATP


release of oxygen


regeneration of the CO2 acceptor

release of oxygen

In the electromagnetic spectrum, the type of radiation that we call visible light occurs between _____.




X-rays and ultraviolet radiation


infrared radiation and radio waves


ultraviolet radiation and infrared radiation


infrared radiation and microwaves


radio waves and microwaves

ultraviolet radiation and infrared radiation

Which of the following is a product of the light reactions of photosynthesis?




high-energy photons


water and CO2


oxygen, ATP, and NADPH


NADP+ and RuBP


glyceraldehyde-3-phosphate

oxygen, ATP, and NADPH

The overall function of the Calvin cycle is _____.




capturing sunlight


producing carbon dioxide


splitting water


making sugar


oxidizing glucose

making sugar

C4 plants occur more commonly in desert conditions because _____.




they produce water as a product of their photosynthetic pathways


they can fix carbon at the lower CO2 concentrations that develop when the stomata are closed


the stomata open at night and close in the day


they produce carbon dioxide internally via photorespiration


they store carbon by incorporating CO2 into organic acids that are later catabolized

they can fix carbon at the lower CO2 concentrations that develop when the stomata are closed

What is the basic role of CO2 in photosynthesis?




CO2 is a source of electrons in the formation of organic molecules.


CO2 is taken in by plants as a form of inverse respiration, in which carbon dioxide is “breathed in” and oxygen is “breathed out.”


CO2 is fixed or incorporated into organic molecules.

CO2 is fixed or incorporated into organic molecules.