Chapter 8: Photosynthesis

The first step in photosynthesis is the

• synthesis of water
• production of sugars
• breakdown of carbon dioxide
• absorption of light energy

The principal pigment in plants is

• chlorophyll
• oxygen
• ATP
• NADPH

Autotrophs are different from heterotrophs because they

• use oxygen to burn food
• do not require oxygen to live
• make carbon dioxide as a product of using food
• make their own food from carbon dioxide and water

The light-dependent reactions of photosynthesis are also known as the

• ATP cycle
• Calvin cycle
• carbon cycle
• sugar cycle

Which substance from the light-dependent reactions of photosynthesis is a source of energy for the light-independent reactions?

• ADP
• H2O
• NADPH
• pyruvic acid

What drives the formation of ATP by ATP synthase?

• buildup of H+ ions
• burning oxygen
• light absorption
• splitting carbon dioxide

What is the function of NADP+?

• It absorbs light
• It is an electron carrier
• It is a light-reflecting pigment
• It acts as long-term energy storage

In addition to light and chlorophyll, photosynthesis requires

• carbon dioxide and sugars
• carbon dioxide and water
• oxygen and sugars
• oxygen and water

Where do plants get the energy they need to carry out photosynthesis?

• Air
• Soil
• Sunlight
• Water

Which of the following are autotrophs?

• Deer
• Grasses
• Leopards
• Mushrooms