Photosynthesis and the Carbon Cycle

What is the main pigment responsible for photosynthesis?

• Chlorophyll
• Carotene
• Melanin
• Hemoglobin

Answer explanation

Chlorophyll captures sunlight for photosynthesis.

True or False: Photosynthesis occurs in the roots of plants.

• True
• False

Answer explanation

Photosynthesis happens in the leaves, not the roots.

Fill in the blank: Photosynthesis takes place in the ______ of plant cells.

• mitochondria
• chloroplasts
• cytoplasm
• cell membrane

Answer explanation

Photosynthesis takes place inside the chloroplasts.

Which of these are the main components needed for photosynthesis?

• Carbon dioxide, water, and light
• Oxygen, glucose, and water
• Water, oxygen, and light
• Glucose, oxygen, and chlorophyll

Answer explanation

These are the essential ingredients for photosynthesis.

Which gas is a by-product of photosynthesis?

• Carbon dioxide
• Oxygen
• Hydrogen
• Nitrogen

Answer explanation

Oxygen is produced and released during photosynthesis.

What does the word ‘photo’ mean in photosynthesis?

• Water
• Light
• Carbon
• Oxygen

Answer explanation

Photo' means light in Greek, representing sunlight in photosynthesis.

What is the equation for photosynthesis?

• Oxygen + Glucose → Water + Energy
• Carbon dioxide + Water → Glucose + Oxygen
• Glucose + Oxygen → Water + Energy
• Carbon dioxide + Water → Glucose + Oxygen

Answer explanation

This is the balanced equation for photosynthesis.

True or False: Photosynthesis happens in all parts of the plant.

• True
• False

Answer explanation

Photosynthesis occurs primarily in the leaves.

Fill in the blank: Chlorophyll is found in the ______ of plant cells.

• nucleus
• chloroplasts
• cytoplasm
• cell wall

Answer explanation

Chlorophyll is located inside the chloroplasts.

What is the primary function of chlorophyll in photosynthesis?

• Absorb water
• Capture sunlight
• Absorb oxygen
• Absorb carbon dioxide

Answer explanation

Chlorophyll captures sunlight, which is necessary for photosynthesis.