Photosynthesis

1. The pigment molecules responsible for photosynthesis are located in the __________

• mitochondria

• cytoplasm of the cell

• stroma of the chloroplast

• thylakoid membrane of the chloroplast

2. During photosynthesis, photons raise electrons to higher energy levels. These excited electrons belong to what compound?

• water

• chlorophyll

• RuBP

• glucose

3. During what stage of photosynthesis is oxygen produced?

• cyclic photophosphorylation

• carbon fixation

• the light-dependent reactions involving photosystems I and II

• Calvin cycle

4. Which of the following is mismatched?

• Photosystem I : uses the P700 molecule in its photocenter

• 3-phosphoglycerate : a 3-carbon compound

• antenna complex : contains hundreds of pigment molecules

• CAM plants : open their stomata during the day and close them at night to avoid photorespiration

5. Which of the following occurs during the light-dependent reactions of plants?

• electron transport

• chemiosmosis

• splitting of water

• all of the above

6. Which of the following is the correct sequence for the movement of electrons during the light-dependent reactions of plants?

• P680 -> P700 -> water -> NADP+

• water -> P700 -> NADP+ -> P680

• water -> P680 -> P700 -> NADP+

• P700 -> P680 -> NADP+ -> water

Light is required for the light dependent reactions because

• it is the source for electrons

• it energizes electrons in the reaction center

• it splits the water molecule

• it splits ATP molecules which generates the energy necessary to power the light

To reduce six molecules of carbon dioxide to glucose via photosynthesis, how many molecules of NADPH and ATP are required?

• 12 NADPH and 18 ATP

• 18 NADPH and 12 ATP

• 12 NADPH and 12 ATP

• 6 NADPH and 6 ATP

9. The immediate products of C3 and C4 photosynthesis are, respectfully:

• ribulose 1,5-bisphosphate; malate

• 3-phosphoglycerate; oxaloacetate

• malate; carbon dioxide

• glyceraldehyde 3-phosphate; phospho-enol-pyruvate (PEP)

10. The light independent reaction in photosynthesis is limited by _________

• CO2, temperature, and light

• CO2, light, and water

• water, temperature, and CO2

• oxygen, water, and temperature