Photosynthesis: A Quiz for Grade 7 Students

What is the primary pigment involved in photosynthesis?

• Melanin

• Carotene

• Hemoglobin

• Chlorophyll

Where in the plant are chlorophyll molecules located?

• Mitochondria

• Chloroplasts

• Vacuole

• Cell membrane

What is the function of stomata in photosynthesis?

• Exchange of gases

• Absorption of water

• Regulation of temperature

• Production of glucose

How does carbon dioxide enter the leaf through the stomata?

• Facilitated diffusion

• Active transport

• Osmosis

• Diffusion

What is the process of converting carbon dioxide into organic compounds known as?

• Decomposition

• Photosynthesis

• Respiration

• Fermentation

What enzyme is responsible for carbon fixation in the Calvin cycle?

• ATP synthase

• RuBisCO

• Glyceraldehyde-3-phosphate dehydrogenase

• Pyruvate kinase

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

• Light helps in the production of glucose in the reactions

• Light provides the carbon dioxide needed for the reactions

• Light is responsible for regulating the temperature in the reactions

• Light provides the energy needed for the reactions

What are the products of the light-dependent reactions?

• Starch, cellulose, and sucrose

• NADH, FADH2, and carbon dioxide

• ATP, NADPH, and oxygen

• Glucose, water, and carbon dioxide

What is the role of ATP and NADPH in the light-independent reactions?

• Provide energy and reducing power for the conversion of carbon dioxide into glucose

• Regulate the temperature of the plant

• Produce oxygen and water as byproducts

• Convert light energy into chemical energy

What is the overall chemical equation for photosynthesis?

• 8CO2 + 8H2O + light energy → C8H16O8 + 8O2

• 4CO2 + 4H2O + light energy → C4H8O4 + 4O2

• 6CO2 + 6H2O + light energy → C6H12O6 + 6O2

• 2CO2 + 2H2O + light energy → C3H6O3 + 2O2