Biochemie

• What are the two main stages of photosynthesis?

  Light-dependent reactions and light-independent (Calvin cycle) reactions
• What are the key regulatory mechanisms in the Calvin cycle?

  Enzyme activation/deactivation, redox regulation, metabolite regulation, feedback inhibition
• How does redox regulation work to control the Calvin cycle?

  The redox state of the cell, influenced by the light reactions, determines the activity of Calvin cycle enzymes
• How is the Calvin cycle regulated in high light intensity?

  The Calvin cycle is stimulated to operate at a higher rate
• How does feedback inhibition regulate the Calvin cycle?

  Buildup of end products like glucose can inhibit earlier steps in the cycle
• What happens to the Calvin cycle when light is limited?

  The Calvin cycle is suppressed
• How does elevated CO2 affect the Calvin cycle?

  It can inhibit Calvin cycle enzymes like rubisco
• How does drought/water stress impact the Calvin cycle?

  Reduced CO2 availability can limit the Calvin cycle
• What is the purpose of the regulatory mechanisms in the Calvin cycle?

  To optimize photosynthetic efficiency in response to changing conditions
• Who invented the concept of the Calvin cycle?

  Melvin Calvin