Quiz on Photorespiration

What is the primary function of RuBisCO in photorespiration?

• To fix nitrogen

• To absorb light energy

• To oxygenate RuBP

• To produce glucose

What percentage of reactions by RuBisCO result in oxygenation instead of carboxylation?

• 25%

• 10%

• 75%

• 50%

Which of the following plants primarily utilize the C4 pathway to minimize photorespiration?

• Barley

• Maize

• Rice

• Wheat

What is produced as a waste product during the oxygenation reaction of RuBisCO?

• Glucose

• Oxygen

• 3-Phosphoglycerate

• Phosphoglycolate

Which condition can increase the rate of photorespiration?

• Increased light intensity

• Higher humidity

• Increased nitrogen levels

• Lowered CO2 levels

What is the main disadvantage of photorespiration in C3 plants?

• It enhances growth

• It promotes nitrogen fixation

• It reduces photosynthetic efficiency

• It increases water loss

Which enzyme is used by CAM plants to capture carbon dioxide?

• RuBisCO

• PEP carboxylase

• NADP+ reductase

• ATP synthase

What is the role of the pyrenoid in eukaryotic algae?

• To absorb light

• To concentrate CO2

• To produce ATP

• To store starch

Which of the following is a characteristic of C4 plants?

• They have a high rate of photorespiration

• They fix CO2 at night

• They are primarily aquatic

• They have specialized bundle sheath cells

What is a potential purpose of photorespiration in plants?

• To reduce water loss

• To increase growth rates

• To assist in nitrogen assimilation

• To enhance light absorption