AP Bio Photosynthesis test review – Flashcards

Which of the following are produced during the light reactions of photosynthesis? a. ADP, NADP+, O2 b. glucose, ADP, NADP+ c. glucose, ADP, NADP+, CO2 d. ATP, NADPH, CO2 e. ATP, NADPH, O2

How do the reaction centers of photosystem I and II differ? a. They preferentially absorb slightly different wavelengths of light. b. One is located in the thylakoid membrane, and the other in the stroma. c. None of the choices are correct. d. Only photosystem I is found in the thylakoid membranes. e. Chlorophyll a is found in photosystem I, and chlorophyll b in photosystem II

Which of the following sequences correctly represents the flow of electrons during photosynthesis? a. NADPH to O2 to CO2 b. NADPH to electron transport chain to O2 c. H2O to photosystem I to photosystem II d. H2O to NADPH to Calvin cycle e. NADPH to chlorophyll to Calvin cycle

Plant cells a. lack mitochondria but have chloroplasts. b. have mitochondria but do not have chloroplasts. c. have mitochondria and chloroplasts. d. lack mitochondria and chloroplasts. e. None of the choices are correct.

Photophosphorylation differs from oxidative phosphorylation in that a. its enzymes are membrane-bound. b. regeneration of ATP is driven by a flow of protons through an ATP synthase. c. energy is stored in the form of a proton concentration difference. d. the final electron acceptor is NADP+ and not oxygen. e. it involves an electron transport chain.

Sunlight is a type of _________________ energy. a. kinetic b. nuclear c. electromagnetic d. potential e. stored

Which of the following statements is a correct distinction between autotrophs and heterotrophs? a. Only heterotrophs require chemical compounds from the environment. b. Cellular respiration is unique to heterotrophs. c. Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that are inorganic. d. Only heterotrophs have mitochondria. e. Only heterotrophs require oxygen.

Which one of the following photosynthetic pigments can be found at the photosystem reaction center? a. phycocyanin b. chlorophyll b c. None of the choices are correct. d. chlorophyll a e. a carotenoid

The electrons lost from the reaction center of photosystem II are replaced by electrons from a. ATP. b. photosystem I. c. H2O. d. NADPH. e. CO2.

The oxygen released into the air as a product of photosynthesis comes from a. None of the choices are correct. b. chlorophyll. c. glucose. d. carbon dioxide. e. water.

p680 is found where?

What contains a reaction center

Which process consumes/uses ATP

What makes NADPH

How is photosynthesis similar in C4 plants and CAM plants? a. In both cases, thylakoids are not involved in photosynthesis. b. In both cases, RuBisCo is not used to fix carbon initially. c. Both types of plants make most of their sugar in the dark. d. In both cases, only photo-system I is used. e. Both types of plants make sugar without the Calvin cycle.

The addition of oxygen to RuBP by rubisco to form a two-carbon product that is then broken down by the cells to carbon dioxide and water defines a. photophosphorylation. b. cellular respiration. c. chemiosmosis. d. aerobic respiration. e. photorespiration.

Which of the following is true concerning the role of redox reactions in photosynthesis and respiration? a. Photosynthesis involves only oxidations while respiration involves only reductions. b. In photosynthesis, carbon dioxide is reduced to form sugar while in respiration, sugar is oxidized to form carbon dioxide. c. Photosynthesis involves only reductions while respiration involves only oxidations. d. In photosynthesis, carbon dioxide is oxidized to form sugar while in respiration, sugar is reduced to form carbon dioxide. e. None of the choices are correct.

In photophosphorylation, energy from electron flow is used to transport ______________ from the ______________ to the thylakoid compartment, generating a concentration gradient of ______________. a. H+ ... stroma ... ATP b. electrons ... grana ... H+ c. electrons ... stroma ... H+ d. H+ ... grana ... electrons e. H+ ... stroma ... H+

Where is chlorophyll found in a plant cell? a. matrix b. cristae c. thylakoid membranes d. cytoplasm e. stroma

Which process is most directly driven by light energy? a. ATP synthesis b. creation of a pH gradient by pumping protons across the thylakoid membrane c. carbon fixation in the stroma d. reduction of NADP+ molecules e. removal of electrons from chlorophyll molecules

Which of the following does not occur during the Calvin cycle? a. consumption of ATP b. carbon fixation c. regeneration of the CO2 acceptor d. release of oxygen e. oxidation of NADPH

To produce one glucose, the Calvin cycle needs ________________ molecule(s) of carbon dioxide a. four b. one c. six d. two e. eight

The light reactions occur in the _______________ while the Calvin cycle occurs in the _______________. a. thylakoid membranes ... stroma b. stroma ... thylakoid membranes c. stroma ... nucleus d. cytoplasm ... thylakoid membrane e. cytoplasm ... stroma

Which of the following has been a major source of ozone destruction over the past 50 years? a. carbon dioxide b. cellular respiration c. chlorofluorocarbons d. ethylene glycol e. chemiosmosis

Where did the energy come from?

Where did the electrons come from?

Where did the H2O come from?

Where did the O2 come from?

Where did the H+ come from?

Where did the ATP come from?

What will the ATP be used for?

Where did the NADPH come from?

What will the NADPH be used for?

Where did the O2 go?