K'Beam_photosynthesis

Which is released as a byproduct of photosynthesis?

• carbon dioxide

• carbon

• oxygen

• water

Which best describes light reactions?

• They are the first stage of photosynthesis.

• They utilize the energy stored in ATP and NADPH.

• They use carbon dioxide to synthesize proteins.

• They create energy-rich ATP and NADPH.

Why do we perceive chlorophyll as being green?

• Because it is green.

• Because it absorbs green light.

• Because it reflects green light.

• Because it absorbs yellow light.

Which would you expect to increase the rate of photosynthesis?

• increasing the carbon dioxide concentration

• decreasing the intensity of exposure to red light

• increasing the oxygen concentration

• decreasing the duration of exposure to red light

Which could be used to monitor the rate of photosynthesis in a plant?

• carbon dioxide production

• water production

• oxygen production

• hydrogen production

Plants need carbon dioxide from their environment to produce glucose during which stage of photosynthesis?

• light reaction

• Calvin cycle

• electron transport chain

• ATP formation

Where do the light reaction occur?

• carotenoid

• mesophyll

• thylakoid membrane

• stroma

When a photon of light energy reaches a reaction center chlorophyll molecule, what becomes excited?

• molecule of water vapor

• an electron

• a carbon dioxide molecule

• an atom of oxygen

The difference between P700 and P680 is that

• the concentration of chlorophyll molecules is greater in P700.

• P680 is only used in the cyclic electron flow.

• P680 is found in algae while P700 is found in land plants.

• P700 absorbs light with a wavelength of 700 nm.

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