Photosynthesis Overview Light Reactions Calvin Cycle More than one way to fix a CO2 Chemiosmosis in Chloroplasts and Mitochondria

100

What is photosynthesis?
Plants are autotrophic organisms that obtain energy for their survival through the process of?

100

What is chlorophyll?
The pigment that gives a plant its green color and absorbs light in the chloroplast?

100

What is carbon dioxide?
The source molecule for carbon, providing most of the dry mass of a plant.

100

What is photorespiration?
Generally thought of as wasteful, this occurs when RuBisCO adds oxygen to ribulose 1,5-bisphosphate.

100

What is chemiosmosis?
Both chloroplasts and mitochondria produce ATP by this process.

200

What is light energy?
Photosynthesis converts _______ energy to chemical energy.

200

What are blue and red light?
The colors of light absorbed by chlorophyll

200

What is glyceraldehyde 3-phosphate? (G3P)
A major carbohydrate metabolic intermediate that can be produced by three cycles of the Calvin Cycle.

200

What are C4 plants?
These separate oxygen generation from the Calvin cycle into different cell types.

200

What is the thylakoid membrane?
The site of electron transport and of the ATP synthase used in photosynthesis

300

What is a chloroplast?
Photosynthesis occurs in what organelle in a plant cell?

300

What is a wavelength?
As this increases, the energy of electromagnetic radiation decreases

300

What is RuBisCO?
The enzyme that catalyzes fixation of CO2 into carbohydrates

300

What is PEP? (phopshoenolpyruvate)
Familiar from the last step of glycolysis, this intermediate is the usual acceptor for CO2 in both C4 and CAM plants. (acronym is sufficient)

300

What is surface area?
The folds of the inner mitochondria membrane and the stacks of thylakoid both serve to increase this.

400

What is the stomata?
Gases, such as carbon dioxide and oxygen, pass in and out of a plant through these pores.

400

What is photosystem II?
The light-harvesting complex at which water is "split" O2 gas is generated.

400

What is NADPH (+H+)?
Supplies the high-energy electrons to reduce 1,3-bisphosphoglycerate to glyceraldehyde 3-phosphate?

400

What are bundle-sheath cells?
Specialized cells for the Calvin cycle in C4 plants where only photosystem I operates (to limit oxygen).

400

What is low? (or acidic)
Because of electron transport, both the inter-membrane space of mitochondria and the thylakoid space in chloroplasts have ______ pH

500

What is "linear electron flow" or the "Z scheme."
This requires both photosystems to get electrons from oxygen eventually to reduce NADP+ to NADPH +H+

500

What is Photosystem 1?
Acting alone, this can generate ATP through the electron transport system, but not O2 gas

500

What are C3 plants?
Notoriously inefficient in both water use and energy production, these plants use RuBisCO to fix carbon dioxide directly from air (with no intermediate steps).

500

What are CAM plants?
These store CO2 in organic acids to be used during the day, when their stomata are closed.

500

What is oxygen?
A the final electron acceptor in respiration and the initial electron donor in photosynthesis.

Chapter 10 Review Game: Photosynthesis

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