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B4 revision ppt
B4 revision ppt

... walls. Both are polymers of glucose  Glucose can also be built up into fats, proteins and chlorophyll  Glucose molecules are broken down by respiration, releasing energy to power chemical reactions in cells ...
Calvin Cycle
Calvin Cycle

... The poetic perspective…  All the solid material of every plant ...
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Metabolic Processes Jeopardy Review
Metabolic Processes Jeopardy Review

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Cellular Respiration NOTES
Cellular Respiration NOTES

... Cellular respiration converts the energy stored in the bonds of the glucose into energy in ATP. Why is it important? – all living organisms need to convert the energy in the food they eat (or in the case of plants in the food they produce through photosynthesis) into a form of energy that is easy to ...
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Slide 1

... Producers have the MOST ...
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Producers - Humble ISD
Producers - Humble ISD

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Chapter 10: Cycles and Patterns in the Biosphere
Chapter 10: Cycles and Patterns in the Biosphere

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Cycles and Patterns in the Biosphere
Cycles and Patterns in the Biosphere

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Midterm - ltcconline.net
Midterm - ltcconline.net

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Nitrogen Cycle Presenter: ___ Nitrogen Fixation: ___ Atmosphere

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Objective: How can we describe the basic characteristics of plants
Objective: How can we describe the basic characteristics of plants

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chapter 8 section 3 notes

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Cellular Respiration and Photosynthesis Notes

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Biology-Scheme of work

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Ch. 6and7_Notes

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Carbon dioxide - cloudfront.net
Carbon dioxide - cloudfront.net

... • Autotrophic organisms: allows absorption of CO₂ into cells. • Add water and energy from the sun. • Organisms use photosynthesis to chemically convert the CO2 to carbonbased sugar molecules. • Sugar, through metabolism, produce complex compounds (proteins, cellulose, and amino acids). ...
Lecture 2
Lecture 2

... Mimimimum of three limitation gives actual A and J rates. Farquhar et al. Planta 1980; Long and Bernacchi J Ex Bot. 2003 ...
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Photosynthesis



Photosynthesis is a process used by plants and other organisms to convert light energy, normally from the Sun, into chemical energy that can be later released to fuel the organisms' activities. This chemical energy is stored in carbohydrate molecules, such as sugars, which are synthesized from carbon dioxide and water – hence the name photosynthesis, from the Greek φῶς, phōs, ""light"", and σύνθεσις, synthesis, ""putting together"". In most cases, oxygen is also released as a waste product. Most plants, most algae, and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs. Photosynthesis maintains atmospheric oxygen levels and supplies all of the organic compounds and most of the energy necessary for life on Earth.Although photosynthesis is performed differently by different species, the process always begins when energy from light is absorbed by proteins called reaction centres that contain green chlorophyll pigments. In plants, these proteins are held inside organelles called chloroplasts, which are most abundant in leaf cells, while in bacteria they are embedded in the plasma membrane. In these light-dependent reactions, some energy is used to strip electrons from suitable substances, such as water, producing oxygen gas. Furthermore, two further compounds are generated: reduced nicotinamide adenine dinucleotide phosphate (NADPH) and adenosine triphosphate (ATP), the ""energy currency"" of cells.In plants, algae and cyanobacteria, sugars are produced by a subsequent sequence of light-independent reactions called the Calvin cycle, but some bacteria use different mechanisms, such as the reverse Krebs cycle. In the Calvin cycle, atmospheric carbon dioxide is incorporated into already existing organic carbon compounds, such as ribulose bisphosphate (RuBP). Using the ATP and NADPH produced by the light-dependent reactions, the resulting compounds are then reduced and removed to form further carbohydrates, such as glucose.The first photosynthetic organisms probably evolved early in the evolutionary history of life and most likely used reducing agents, such as hydrogen or hydrogen sulfide, as sources of electrons, rather than water. Cyanobacteria appeared later; the excess oxygen they produced contributed to the oxygen catastrophe, which rendered the evolution of complex life possible. Today, the average rate of energy capture by photosynthesis globally is approximately 130 terawatts, which is about three times the current power consumption of human civilization.Photosynthetic organisms also convert around 100–115 thousand million metric tonnes of carbon into biomass per year.
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