Glucose's Role in Plant Energy Production

Steps:

• Recall that photosynthesis produces glucose as an energy-rich molecule for immediate or stored use.
• Identify immediate uses: glucose is directly broken down in cellular processes without conversion.
• Evaluate options: focus on energy provision versus structural or transport roles.
• Select the process where glucose is used right away for ATP production.

Why B is correct:

• In respiration, glucose is oxidized via glycolysis and the Krebs cycle to produce ATP, providing immediate energy as defined by the equation: C6H12O6 + 6O2 → 6CO2 + 6H2O + ATP.

Why the others are wrong:

• A: Cell walls use cellulose, a converted polymer of glucose, not immediate glucose.
• C: Phloem stores sucrose, a converted disaccharide, not raw glucose.
• D: Phloem transports sucrose for energy distribution, not immediate use of glucose.

Final answer: B