Photosynthesis Reading

What is the main purpose of the light reactions in photosynthesis?

• To capture energy from sunlight and convert it into chemical energy

• To release carbon dioxide as a waste product

• To absorb water and nutrients from the soil

• To produce glucose directly

During the light reactions, chlorophyll absorbs light energy and becomes ___.

What is the role of the first electron transport chain in the light reactions?

• To pump hydrogen ions and create a chemiosmotic gradient

• To directly produce glucose

• To release oxygen gas

• To absorb carbon dioxide

The oxygen released during photosynthesis is a byproduct of which process?

• Photolysis of water

• Formation of ATP

• Carbon fixation

• Electron transport chain

Chloroplasts capture sunlight energy in two ways: by exciting electrons and by splitting ___.

What is the chemiosmotic gradient?

• A higher concentration of hydrogen ions inside the thylakoid than outside

• A difference in oxygen levels inside and outside the chloroplast

• A gradient of glucose concentration

• A temperature gradient across the chloroplast membrane

NADPH and ATP store energy from excited electrons in the form of ___.