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BCHM 3P01 Lecture Notes - Lecture 8: Light-Independent Reactions, Aldehyde, Aldose

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1 Mar 2020

School

Brock University

Department

Course

Professor

Aleksandar Necakov

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Document Summary

Allows atp production to be decoupled or independent from nadph. Atp synthesis by photophosphorylation: the transport of 3 protons out of the lumen back to the stroma (through the. Atp synthase) results in the production of one atp: 4 atp (requiring 12 h+) can be produced per o2 evolved, which requires about 8 photons, thus cyclic vs noncyclic photosynthesis offers different efficiencies to atp production. Noncyclic: 8 photons = 12h+ = 4atp or 0. 5 atp per photon. Atp synthesis by photophosphorylation: cyclic transport, while more efficient for atp production missed out on the ability to produce nadph, which contains large amounts of potential energy, each nadph has enough energy to produce 3 atp, so 2. Nadph (produced from nonyclic transport) boosts the previous numbers from 4 atp to 10 atp per 8 photons, or roughly 1. 25atp per photon: thus noncyclic is about 2x more efficient than cyclic.

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Related Questions

What are the overall inputs (substrates andenergy sources) and outputs (products and by products) for thelight-dependent reactions of photosynthesis and thelight-independent reactions ofphotosynthesis? How are the light-capturingand Calvin cycle parts of photosynthesiscoupled? Where do the reactions of thelight-capturing part of photosynthesis takeplace? the Calvin cyclereactions?

Can you please help me with a simple and short answers please. Also no meed for explanation i just need answers.

6.4 The Light Reactions and the Calvin Cycle Reactions Review the introduction to this laboratory. Note the overall equation for photosynthesis and that photosynthesis consists of the light reactions and the Calvin cycle reactions. Solar energy is absorbed by photosynthetic pigments during the light reactions and energy is used during the Calvin cycle reactions to reduce carbon dioxide to a carbohydrate. Light Reactions 1. Photosynthetic pigments a. What is the function of the photosynthetic pigments in photosynthesis? b. How does it benefit a plant to have a variety of photosynthetic pigments? (See Fig. 6.5.) c. Green light minimally promotes photosynthesis. Account for this observation with reference to the photosynthetic pigments. (See Fig. 6.5.) d. Does this explain why leaves are green? How so? 2. Water and oxygen happens to water during the light reactions? a. What b. What happens to the released oxygen? 3Â·Location of the light reactions membranes. Fill in the blank: The light reactions take place in the 4. In your own words, summarize the light reactions based on this laboratory Calvin Cycle Reactions 1. Carbon dioxide and carbohydrate What happens to carbon dioxide after it is taken up during the Calvin cycle reactions? 2. Location of the Calvin cycle reaction Fill in the blank: The Calvin cycle reactions take place in the 3. In your own words, summarize the Calvin cycle reactions based on this laboratory. Light Reactions and the Calvin Cycle Reactions 1. Examine the overall equation for photosynthesis and show that there is a relationship between the light reactions and the Calvin cycle reactions by drawing an arrow between the hydrogen atoms in water and the hydrogen atoms in the carbohydrate co, + H2O â (CH20) + 02 2. Only because solar energy splits water can hydrogen atoms be used to reduce carbon dioxide. In this sense, solar energy is now stored in the carbohydrate. This energy sustains all the organisms in the biosphere 6-9 Laboratory 6 Photosynthesis 73

1. What does sex linked mean?

2. describe the meaning of the following terms: incompletedominance, co-dominance, polygenic?

3. Genes that are on the X or Y chromosomes are called?

4 The observed characteristics of an organism are called?

5. Why are plants the basis of food chains?

6. The energy to fix CO2 in the calvin cycle comes fromwhat(where)?

7. What role does water play in phottosynthesis and why?

8. In respiration, glucose is oxidized to what compounds?

9. In photosynthesis, glucose is oxidezed to what?

10. What is produced in the thylakoids duringphotosynthesis?

11. The "dark" reactions of photosynthesis takes placewhere?

12. The oxygen generated during photosynthesis comes fromwhat?