Photosynthesis Quiz

What is the primary function of light-dependent reactions in photosynthesis?

• Generate glucose directly from light

• Produce oxygen as a byproduct

• Convert light energy into chemical energy

• Release carbon dioxide

Which molecules are produced during the light-dependent reactions?

• Carbon Dioxide and Water

• Chlorophyll and Sunlight

• ATP and NADPH

• Glucose and Oxygen

What is the role of chlorophyll in the light-dependent reactions?

• Chlorophyll regulates the temperature of the plant

• Chlorophyll releases oxygen during the process

• Chlorophyll absorbs light energy and converts it into chemical energy.

• Chlorophyll stores light energy for later use

Explain the process of photolysis in the light-dependent reactions.

• Light energy is absorbed by chlorophyll, which splits water into oxygen, protons, and electrons.

• Light energy is used to convert carbon dioxide into glucose, releasing oxygen and protons.

• Chlorophyll absorbs water and releases oxygen, carbon dioxide, and electrons.

• Photolysis involves the breakdown of glucose into water, protons, and electrons.

What is the Calvin cycle and where does it take place in the chloroplast?

• The Calvin cycle takes place in the stroma of the chloroplast.

• The Calvin cycle happens in the nucleus of the chloroplast.

• The Calvin cycle occurs in the cytoplasm of the chloroplast.

• The Calvin cycle takes place in the thylakoid membrane of the chloroplast.

List the three main stages of the Calvin cycle.

• Carbon fixation, Oxidation phase, Regeneration of RuBP

• Reduction phase, Photorespiration, Regeneration of ATP

• Calvin phase, Reduction of CO2, Formation of Glucose

• Carbon fixation, Reduction phase, Regeneration of RuBP

How does carbon dioxide enter the Calvin cycle?

• Through carbon fixation by combining with RuBP using RuBisCO enzyme

• Via passive diffusion across the cell membrane

• Through direct absorption from the atmosphere

• By binding with ATP molecules

What are the factors that can affect the rate of photosynthesis?

• Wind speed, soil pH, humidity

• Light intensity, carbon dioxide concentration, temperature, water availability

• Oxygen level, plant species, time of day

• Nitrogen concentration, cloud cover, altitude

How does temperature influence photosynthesis?

• Higher temperatures decrease the efficiency of photosynthesis.

• Photosynthesis occurs faster at lower temperatures.

• Temperature has no impact on photosynthesis.

• Temperature affects the rate of enzyme activity in photosynthesis.

Explain the role of light intensity in photosynthesis.

• Light intensity has no impact on photosynthesis

• Photosynthesis occurs faster in complete darkness

• Light intensity affects the rate of photosynthesis by influencing the amount of energy available for the process.

• Photosynthesis is not affected by the amount of light available