8.3 The Process of Photosynthesis

A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27 degrees Celsius. The gas being collected is most likely

• oxygen

• carbon dioxide

• ATP

• glucose

Photosynthesis uses sunlight to convert water and carbon dioxide into

• oxygen and carbon

• high-energy sugars and proteins

• ATP and oxygen

• oxygen and high-energy sugars

In the overall equation for photosynthesis, six molecules of carbon dioxide and six molecules of water result in a molecule of sugar and six molecules of

• glucose

• water

• oxygen

• ATP

Where do light-dependent reactions take place?

• in the stroma of the chloroplast

• within the mitochondria membranes

• within the thylakoid memranes

• in the outer membrane of the chloroplasts

What are the products of the light-dependent reactions?

• oxygen gas and glucose

• ATP, NADPH, and oxygen gas

• ATP, carbon dioxide gas, and NADPH

• carbon dioxide gas, oxygen gas, and NADPH

Which of the following is NOT a step in the light-dependent reactions?

• High-energy electrons move through the ETC

• Pigments in Photosystem II absorb light

• ATP synthase allows H+ ions to pass through the thylakoid membrane

• ATP and NADPH are used to produce high-energy sugars.

What action contributes to the inside of the thylakoid membrane becoming positively charged during the light-dependent reactions?

• H+ ions are released as water splits

• ATP synthase allows H+ ions to pass through the membrane

• ATP synthase produces ATP from ADP

• Carbon dioxide builds up in the stroma

Where are photosystems I and II found?

• in the stroma

• in the thylakoid membrane

• in the Calvin Cycle

• in the cell membrane

Which of the following activities happens within the stroma?

• Photosystem I absorbs light

• ATP synthase produces ATP

• The Calvin Cycle produces sugars

• Electrons move through the ETC

Which pathway represents the flow of electrons during photosynthesis?

• H2O --> Photosystem I --> Photosystem II

• O2 --> ADP --> Calvin Cycle

• Photosystem I --> Calvin Cycle --> NADP+

• H2O --> NADP+ --> Calvin Cycle