Photosynthesis and Plant Types Quiz

What is the primary purpose of carbon fixation in photosynthesis?

• To release oxygen into the atmosphere

• To convert carbon dioxide into glucose

• To absorb sunlight for energy

• To produce water as a byproduct

What problem do C3 plants face when their stomata are open?

• Increased carbon dioxide intake

• Reduced glucose production

• Excessive water loss

• Increased oxygen intake

How do C3 plants respond to hot and dry conditions?

• They increase photosynthesis rate

• They produce more oxygen

• They open their stomata wider

• They close their stomata to conserve water

What is a key structural difference between C3 and C4 plants?

• C4 plants have more palisade mesophyll cells

• C4 plants have larger stomata

• C3 plants have larger bundle sheath cells

• C3 plants have thicker leaves

What compound do C4 plants use to initially fix carbon dioxide?

• PGA

• RUBP

• PEP

• Glucose

In the C4 pathway, what is oxaloacetate converted into?

• RUBP

• Pyruvate

• Malate

• Glucose

What is the role of PEP in the C4 pathway?

• To transport oxygen

• To fix carbon dioxide selectively

• To produce glucose

• To absorb sunlight

How do CAM plants minimize water loss?

• By increasing leaf surface area

• By opening stomata at night

• By closing stomata at night

• By opening stomata during the day

What is a unique feature of CAM plants compared to C4 plants?

• They use bundle sheath cells

• They fix carbon dioxide at night

• They produce more oxygen

• They have larger leaves

What happens to malate in CAM plants during the day?

• It is converted into glucose

• It is stored for later use

• It is used to absorb sunlight

• It splits into pyruvate and carbon dioxide