2. In the dark reaction, plant cells can fix CO2 into glycealdehyde-3-phosphate (G3P) in the stroma of chloroplasts, then into glucose or sucrose (sugar) in cytoplasm.
How many CO2, high energy electrons and ATP are required to make 1 molecule of sucrose from CO2?
CO2: ______________ High energy electrons: ______________ ATP: _______________
The source of electrons used in the dark reaction is H2O. The low-energy electrons from H2O are excited and converted to high-energy electrons by the light in the light reaction. How many molecules of H2O will be required to make 1 molecule of sucrose?
Spinach has a high tolerance against cold weather and increases its sweetness when it grows under a light frost. Explain how spinach cells can survive under the freezing temperature. Your explanation should correlate how this protective mechanism increases the sweetness of spinach. What chemical principle does spinach use to protect itself from cold weather?