10BD 8-3: The Process of Photosynthesis

What is the primary function of photosynthesis?

• To produce oxygen

• To convert light energy into chemical energy

• To absorb carbon dioxide

• To produce water

Tags

NGSS.HS-LS1-5

Which statement is correct regarding the light-dependent reaction?

• A water molecule is split and one oxygen atom combines with another oxygen atom to form O₂ and is released.

• CO₂ enters the cycle and is added to RuBP, forming a 6-carbon molecule.

• It takes six turns of the cycle to create one glucose molecule.

• One of six G3P molecules is removed from the cycle to build into glucose and other energy-storing molecules.

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Where do the light-dependent reactions of photosynthesis occur?

• In the stroma

• In the thylakoid membrane

• In the cytoplasm

• In the mitochondria

What is the correct order of steps for the light-dependent reactions?

• photosystem II

  electron transport chain

  ATP synthesis

• ATP synthesis

  photosystem II

  electron transport chain

• carbon fixation

  photosystem II

  electron transport chain

• photosystem II

  carbon fixation

  ATP synthesis

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Which molecule is the terminal electron acceptor in the light-dependent reactions?

• ATP

• NADP+

• RuBP

• Oxygen

What is the correct order of steps for the light-independent reactions?

• photosystem II

  carbon fixation

  regeneration of RuBP

• carbon fixation

  reduction

  regeneration of RuBP

• reduction

  regeneration of RuBP

  carbon fixation

• carbon fixation

  photosystem II

  regeneration of RuBP

Explain why the thylakoid stroma is more negatively charged than the lumen.

• Because of the accumulation of H+ ions in the lumen

• Due to the presence of ATP synthase

• Because of the splitting of water molecules

• Due to the presence of chlorophyll

Describe the role of ATP synthase in photosynthesis.

• It captures light energy

• It splits water molecules

• It synthesizes ATP from ADP and inorganic phosphate

• It transports electrons

Which statement is correct regarding the light-independent reactions?

• A reaction on the lumen side of the thylakoid strips two electrons from water.

• Light energy is captured by photosystem II.

• Reactive electrons pump H⁺ ions from the stroma to the lumen.

• The end result is a glucose molecule that contains more energy than a single ATP molecule.

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

How does the Calvin cycle contribute to the process of photosynthesis?

• By producing oxygen

• By fixing carbon dioxide into sugars

• By generating ATP

• By splitting water molecules

Tags

NGSS.HS-LS2-5