Podcast
Questions and Answers
What is the primary function of the Calvin cycle?
What is the primary function of the Calvin cycle?
- Use NADPH to release carbon dioxide
- Transport RuBP out of the chloroplast
- Use ATP to release carbon dioxide
- Synthesize simple sugars from carbon dioxide (correct)
- Split water and release oxygen
In C₃ photosynthesis, the reactions that require ATP take place in?
In C₃ photosynthesis, the reactions that require ATP take place in?
- The light reactions alone
- The chloroplast, but is not part of photosynthesis
- The Calvin cycle alone (correct)
- Both the light reactions and the Calvin cycle
- Neither the light reactions nor the Calvin cycle
In a plant leaf, the reactions that produce NADH occur in?
In a plant leaf, the reactions that produce NADH occur in?
- The Calvin cycle alone
- Neither the light reactions nor the Calvin cycle (correct)
- The light reactions alone
- The chloroplast, but is not part of photosynthesis
- Both the light reactions and the Calvin cycle
The NADPH required for the Calvin cycle comes from?
The NADPH required for the Calvin cycle comes from?
Reactions that require CO₂ take place in?
Reactions that require CO₂ take place in?
Which of the following statements best represents the relationships between the light reactions and the Calvin cycle?
Which of the following statements best represents the relationships between the light reactions and the Calvin cycle?
Three 'turns' of the Calvin cycle generate a 'surplus' molecule of glyceraldehyde 3-phosphate (G3P). Which of the following is a consequence of this?
Three 'turns' of the Calvin cycle generate a 'surplus' molecule of glyceraldehyde 3-phosphate (G3P). Which of the following is a consequence of this?
After phosphorylation and reduction produce glyceraldehyde 3-phosphate (G3P), what more needs to happen to complete the Calvin cycle?
After phosphorylation and reduction produce glyceraldehyde 3-phosphate (G3P), what more needs to happen to complete the Calvin cycle?
Which, if any, relationship would you expect to find regarding the pH measurements of the thylakoid space, stroma, and cytosol of a particular plant cell?
Which, if any, relationship would you expect to find regarding the pH measurements of the thylakoid space, stroma, and cytosol of a particular plant cell?
The phylogenetic distribution of the enzyme rubisco is limited to?
The phylogenetic distribution of the enzyme rubisco is limited to?
Photorespiration occurs when rubisco reacts RuBP with?
Photorespiration occurs when rubisco reacts RuBP with?
Study Notes
Calvin Cycle Overview
- The primary function of the Calvin cycle is to synthesize simple sugars from carbon dioxide.
- This cycle requires ATP exclusively during its reactions, differentiating it from light reactions.
Photosynthesis Mechanisms
- In C₃ photosynthesis, ATP is consumed only within the Calvin cycle.
- NADH is not produced in either the light reactions or the Calvin cycle.
NADPH Source
- NADPH necessary for the Calvin cycle originates from reactions initiated in photosystem I.
Carbon Dioxide Utilization
- CO₂ is utilized solely in the Calvin cycle, highlighting its role in sugar production.
Light Reactions and Calvin Cycle Interaction
- The light reactions produce ATP and NADPH, which are utilized by the Calvin cycle, returning ADP, Pi, and NADP⁺ back to the light reactions.
G3P Production in Calvin Cycle
- Three turns of the Calvin cycle yield a surplus of glyceraldehyde 3-phosphate (G3P), crucial for forming sucrose and starch.
Carbon Fixation Process
- During carbon fixation, RuBP combines with CO₂ to create a six-carbon molecule, subsequently splitting into two molecules of 3-phosphoglycerate. Regeneration of RuBP is vital for completing the cycle.
Thylakoid pH Relationship
- The pH within the thylakoid space is lower compared to that of the stroma, indicating a gradient critical for photosynthesis.
Rubisco Distribution
- The enzyme rubisco is found across all known photoautotrophs, encompassing both bacterial and eukaryotic organisms.
Photorespiration Context
- Photorespiration occurs when rubisco reacts RuBP with oxygen (O₂), impacting plant efficiency in carbon fixation.
Studying That Suits You
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Description
Test your knowledge of the Calvin cycle and C₃ photosynthesis with these flashcards from Chapter 10. Each card helps reinforce key concepts and definitions related to photosynthesis processes. Perfect for students looking to solidify their understanding of plant biology.
