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Questions and Answers
What is the summary equation for the light reactions in photosynthesis?
What is the summary equation for the light reactions in photosynthesis?
- 12 H2O + 6 CO2 + light energy $\rightarrow$ C6H12O6 + 6 O2
- 12 H2O + 12 NADP+ + 18 ADP + 18 Pi + light and chlorophyll $\rightarrow$ 6 O2 + 12 NADPH + 18 ATP (correct)
- 6 CO2 + 6 H2O + light energy $\rightarrow$ C6H12O6 + 6 O2
- 6 CO2 + 12 NADPH + 18 ATP $\rightarrow$ C6H12O6 + 6 O2
Which enzyme is involved in the Calvin Cycle reactions of photosynthesis?
Which enzyme is involved in the Calvin Cycle reactions of photosynthesis?
- NADP reductase
- ATP synthase
- RubisCO (correct)
- PEP carboxylase
What is the role of the C4 photosynthesis strategy?
What is the role of the C4 photosynthesis strategy?
- Maximizing water use efficiency in arid conditions
- Enhancing light capture efficiency in low light conditions
- Spatial separation of carbon fixation and the Calvin Cycle to reduce photorespiration (correct)
- Temporal separation of carbon fixation and the Calvin Cycle to reduce photorespiration
What is the primary function of the non-cyclic electron pathway in photosynthesis?
What is the primary function of the non-cyclic electron pathway in photosynthesis?
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What are the 3 main pigments involved in photosynthesis?
What are the 3 main pigments involved in photosynthesis?
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Study Notes
Photosynthesis and Cellular Energy Production
- The process of photosynthesis in plant cells involves the absorption of light by three main pigments in the electromagnetic spectrum.
- Light reactions, also known as light-dependent reactions, take place in the thylakoid membranes of chloroplasts and involve a non-cyclic electron pathway.
- The non-cyclic electron pathway includes components such as plastoquinone, cytochrome, plastocyanin, and ferredoxin.
- Light reactions result in the conversion of 12 molecules of water, 12 NADP+, and 18 ADP + 18 Pi, in the presence of light and chlorophyll, into 6 molecules of oxygen, 12 NADPH, and 18 ATP.
- The Calvin cycle, also known as light-independent reactions, involves the RubisCO enzyme and is essential for the conversion of carbon dioxide into organic compounds.
- Different photosynthetic strategies include the C3 strategy, C4 strategy, and CAM strategy, each involving spatial or temporal separation of steps for carbon fixation.
- The information is sourced from "Inquiry into Life, 13th edition" by SS Mader and "Biology Libre Texts".
- Photosynthesis is a crucial process for the production of energy and organic compounds in plant cells.
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