Open Question
Predict how the following conditions would affect the production of O2, ATP, and NADPH and state whether noncyclic or cyclic electron flow would occur in each;(2)blue and red photons hit a chloroplast, but no NADP+ is available
9. Photosynthesis
Light Reactions of Photosynthesis
Back9. Photosynthesis
Light Reactions of Photosynthesis
- Multiple Choice
Describe the primary function of the light reactions of photosynthesis.
a) Production of NADPH used in cellular respiration.
b) Use of ATP to make glucose.
c) Conversion of chemical energy to light energy.
d) Production of ATP and NADPH.
- Multiple Choice
Where do the electrons that are excited in photosystem II come from?
a) CO2.
b) O2.
c) Glucose.
d) Photosystem I.
e) Water.
- Multiple Choice
During the light reactions, photosystem I functions to_________, and photosystem II functions to __________.
a) Reduce CO2; oxidize NADPH.
b) Synthesize ATP; Produce O2.
c) Produce O2; oxidize NADPH.
d) Reduce NADP+; oxidize H2O.
- Multiple Choice
What is the correct order of steps of the light reactions of Photosynthesis?
a) photosystem I, ETC, photosystem II, NADP+ reduction, chemiosmosis.
b) photosystem I, photosystem II, ETC, NADP+ reduction, chemiosmosis.
c) photosystem II, ETC, photosystem I, NADP+ reduction, chemiosmosis.
d) photosystem II, photosystem I, ETC, NADP+ reduction, chemiosmosis.
- Multiple ChoiceWhat structure is formed by the reaction center, light-harvesting complexes, and primary electron acceptors that cluster in the thylakoid membrane?
- Multiple ChoiceWhere do the electrons entering photosystem II come from?
- Multiple ChoiceWhich of the following is cycled in the cyclic variation of the light reactions?
- Multiple ChoiceMolecular oxygen is produced during __________.
- Multiple ChoiceBoth mitochondria and chloroplasts __________.
- Multiple ChoiceDuring photosynthesis in a eukaryotic cell, an electrochemical gradient is formed across the __________.
- Multiple ChoiceThe light reactions of photosynthesis generate high-energy electrons, which end up in __________ through linear electron flow. The light reactions also produce __________ and __________.
- Multiple ChoiceThe energy used to produce ATP in the light reactions of photosynthesis comes from __________.
- Open QuestionAdd labels to the figure that follows, which illustrates the product and reactants of photosynthesis and the relationship between its light reactions and light-independent reactions.
- Open QuestionWhich of the following sequences correctly represents the flow of electrons during photosynthesis?a. NADPH→O2→CO2b. H2O→NADPH→Calvincyclec. H2O→photosystemI→photosystemII d. NADPH→electrontransportchain→O2