C3.1 Photosynthesis - SL

What is the primary energy transformation that occurs during photosynthesis?

• Nuclear energy to electrical energy

• Chemical energy to thermal energy

• Light energy to chemical energy

• Mechanical energy to light energy

Write the word equation for photosynthesis with glucose as the product.

• Carbon dioxide + Water + Sunlight → Glucose + Oxygen

• Water + Sunlight → Carbon dioxide + Glucose + Oxygen

• Glucose + Oxygen → Carbon dioxide + Water + Sunlight

• Carbon dioxide + Oxygen + Sunlight → Glucose + Water

What is the role of carbon dioxide in photosynthesis?

• Carbon dioxide is absorbed by animals during respiration.

• Carbon dioxide is converted into oxygen during photosynthesis.

• Carbon dioxide is a waste product of photosynthesis.

• Carbon dioxide is used by plants to produce glucose during photosynthesis.

Which organisms are known to perform photosynthesis?

• Mushrooms, yeast, and worms.

• Insects, reptiles, and amphibians.

• Fungi, viruses, and mammals.

• Plants, algae, and some bacteria.

What is produced as a by-product of photosynthesis?

• Carbon dioxide

• Oxygen

• Glucose

• Water

From where does the oxygen produced in photosynthesis originate?

• Glucose (C6H12O6) produced during respiration.

• Water (H2O) molecules.

• Carbon dioxide (CO2) molecules.

• Nitrogen (N2) absorbed from the air.

What technique can be used to separate and identify photosynthetic pigments?

• Centrifugation

• Microscopy

• Electrophoresis

• Chromatography

How can Rf values be calculated in chromatography?

• Rf = (mass of the compound) / (volume of the solvent)

• Rf = (time taken for the compound) / (time taken for the solvent front)

• Rf = (distance traveled by the compound) / (distance traveled by the solvent front)

• Rf = (temperature of the compound) / (temperature of the solvent)

Which of these are the main photosynthetic pigments found in plants?

• Anthocyanins

• Xanthophylls

• Carotenoids

• Chlorophyll

Why is the absorption of light energy important in photosynthesis?

• It prevents the plant from overheating during the day.

• It helps in the formation of oxygen gas during photosynthesis.

• It is important because it provides the energy required for converting carbon dioxide and water into glucose during photosynthesis.

• It is necessary for the absorption of nutrients from the soil.