Understanding Photosynthesis

What are the main products of the light-dependent reactions?

• Glucose, ATP, and carbon dioxide

• NADH, glucose, and water

• Oxygen, carbon dioxide, and glucose

• ATP, NADPH, and oxygen

Where do the light-dependent reactions occur in the chloroplast?

• Outer membrane

• Thylakoid membranes

• Cytoplasm

• Stroma

What is the role of chlorophyll in photosynthesis?

• Chlorophyll is responsible for water absorption.

• Chlorophyll absorbs light energy for photosynthesis.

• Chlorophyll converts carbon dioxide into glucose.

• Chlorophyll releases oxygen during photosynthesis.

How does water contribute to the light-dependent reactions?

• Water is used to store energy during the light-dependent reactions.

• Water acts as a catalyst for the Calvin cycle.

• Water absorbs light energy and releases carbon dioxide.

• Water provides electrons and protons for the light-dependent reactions and produces oxygen as a byproduct.

What is the primary function of ATP and NADPH produced in the light-dependent reactions?

• NADPH is mainly used for cellular respiration.

• ATP is primarily used for photosynthesis only.

• The primary function of ATP is to provide energy, and the primary function of NADPH is to provide reducing power for the synthesis of glucose.

• ATP and NADPH are both used for protein synthesis.

Describe the main steps of the Calvin cycle.

• The Calvin cycle is a part of cellular respiration.

• The Calvin cycle produces ATP and NADPH.

• Photosynthesis occurs in the mitochondria.

• The Calvin cycle involves carbon fixation, reduction of 3-phosphoglycerate to G3P, and regeneration of ribulose bisphosphate.

What is the significance of carbon fixation in the Calvin cycle?

• Carbon fixation is primarily responsible for water absorption in plants.

• Carbon fixation is a process that occurs only at night.

• Carbon fixation is crucial for converting atmospheric CO2 into organic compounds, enabling plant growth and energy production.

• Carbon fixation releases oxygen into the atmosphere.

How many molecules of CO2 are required to produce one glucose molecule in the Calvin cycle?

• 10

• 8

• 4

• 6

What is the overall equation for photosynthesis?

• C6H12O6 + 6O2 -> 6CO2 + 6H2O + light energy

• 6CO2 + 6H2O -> C6H12O6 + 6O2 + light energy

• 6O2 + C6H12O6 + light energy -> 6CO2 + 6H2O

• 6CO2 + 6H2O + light energy -> C6H12O6 + 6O2

What are the reactants and products of photosynthesis?

• Reactants: Nitrogen (N2) and sunlight; Products: Glucose (C6H12O6) and carbon monoxide (CO)

• Reactants: Carbon dioxide (CO2) and water (H2O); Products: Glucose (C6H12O6) and oxygen (O2)

• Reactants: Oxygen (O2) and glucose (C6H12O6); Products: Carbon dioxide (CO2) and water (H2O)

• Reactants: Water (H2O) and glucose (C6H12O6); Products: Carbon dioxide (CO2) and energy (ATP)