A) results in CO2 fixation. B) replaces cellular respiration. C) generates a proton gradient. D) results in stimulated plant growth. E) occurs when CO2 levels are low. A) results in CO2 fixation. B) replaces cellular respiration. C) generates a proton gradient. D) results in stimulated plant growth. E) occurs when CO2 levels are low.

Refer to the sketch of a chloroplast and the two chemical equations below. Equation 1: 3 CO2 + 9 ATP + 6 NADPH + 5 H2O F1S1S1W1F1F1F10 G3P + 9 ADP + 9 Pi + 6 NADP+ + 2 H+ Equation 2: 2 H2O + 3 ADP + 3 Pi + 2 NADP+ F1S1S1W1F1F1F10 O2 + 3 ATP + 2 NADPH Match the structure/location in the chloroplast with its name and the chemical reaction that takes place there.

A) A = thylakoids, equation 1; B = stroma, equation 2 B) A = thylakoids, equation 2; B = stroma, equation 1 C) A = stroma, equation 1; B = thylakoids, equation 2 D) A = thylakoids, equations 1 and 2; B = stroma E) A = thylakoids; B = stroma, equations 1 and 2 A) A = thylakoids, equation 1; B = stroma, equation 2 B) A = thylakoids, equation 2; B = stroma, equation 1 C) A = stroma, equation 1; B = thylakoids, equation 2 D) A = thylakoids, equations 1 and 2; B = stroma E) A = thylakoids; B = stroma, equations 1 and 2

If a C3 plant does not open its stomata on a sunny, hot day,

A) it will synthesize more water from photosynthesis. B) photorespiration will become favorable. C) photosynthesis will be more effective. D) more ATP and NADPH can be synthesized. E) only ATP can be synthesized. A) it will synthesize more water from photosynthesis. B) photorespiration will become favorable. C) photosynthesis will be more effective. D) more ATP and NADPH can be synthesized. E) only ATP can be synthesized.

The O2 gas produced during photosynthesis is derived from

A) carbon dioxide. B) sugar. C) water. D) ATP. E) bicarbonate ions. A) carbon dioxide. B) sugar. C) water. D) ATP. E) bicarbonate ions.

When RuBP reacts with O2,

A) it cannot react with CO2. B) carbohydrate production increases. C) plant growth is stimulated. D) net carbon fixation increases by 25 percent. E) two carbon molecules combine to form the four-carbon phosphoglycolate. A) it cannot react with CO2. B) carbohydrate production increases. C) plant growth is stimulated. D) net carbon fixation increases by 25 percent. E) two carbon molecules combine to form the four-carbon phosphoglycolate.

Both C4 plants and C3 plants

A) use rubisco to carboxylate RuBP. B) use PEP carboxylase to form oxaloacetate. C) keep CO2 levels high around rubisco. D) express rubisco in bundle sheath cells. E) keep PEP carboxylase in the mesophyll cells. A) use rubisco to carboxylate RuBP. B) use PEP carboxylase to form oxaloacetate. C) keep CO2 levels high around rubisco. D) express rubisco in bundle sheath cells. E) keep PEP carboxylase in the mesophyll cells.

A) generates ATP and NADPH. B) is part of photorespiration. C) uses CO2 to synthesize the sugar phosphate G3P. D) adds O2 to RuBP. E) is not always dependent upon photosynthesis for energy. A) generates ATP and NADPH. B) is part of photorespiration. C) uses CO2 to synthesize the sugar phosphate G3P. D) adds O2 to RuBP. E) is not always dependent upon photosynthesis for energy.