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Biology Week 7 Notes

by: Takira Boyd

Biology Week 7 Notes BIOL 1504.9HO

Takira Boyd

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About this Document

5.1 Overview of Photosynthesis 5.2 The Light- Dependent Reactions of Photosynthesis 5.3 The Calvin Cycle
Principles of Biology
Mr. Mager
Class Notes
Bio, viology, Science, lab, Week 7, week, seven, notes, Biology, kxx, kcc, kankakee, comunity, college
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This 2 page Class Notes was uploaded by Takira Boyd on Tuesday October 4, 2016. The Class Notes belongs to BIOL 1504.9HO at Kankakee Community College taught by Mr. Mager in Winter 2016. Since its upload, it has received 8 views. For similar materials see Principles of Biology in Biology at Kankakee Community College.


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Date Created: 10/04/16
Principles of Biology BIOL 1504.9HO Week 7 Notes  5.1 Overview of Photosynthesis  Autotroph­ living things that can make their own food (Plants, some bacteria, and  algae)  “self”­ auto, “feeder”­ troph  Photoautotrophs­ autotrophs that use sunlight and carbon to make carbohydrates.  All living things that perform photosynthesis need sunlight.  Chlorophyll a is the most common/ plentiful pigment  Heterotrophs­ these organisms are not able to do photosynthesis so they get  energy from food or consuming other animals (Humans and all animals)  “other”­ hetero, “feeder”­troph  They depend on autotrophs indirectly or directly. Photosynthesis (Structures/Summary)  Requires sunlight, carbon dioxide, and water to start the reaction  After that happens oxygen releases and makes carbohydrates (most commonly it  is glucose)  Sugar made=energy for living things to live  Photosynthesis Equation 6CO2 (Carbon Dioxide) + 6H20 (Water) C6H12O6 (Sugar) + 6O2 (Oxygen)  Mesophyll­ middle layer of the leaf where photosynthesis occurs.  Photosynthesis also occurs on the surface of the leaf  Stomata­ carbon dioxide and oxygen exchange which happens through this  opening  Chloroplast­ have a double (inner/outer membrane)  Thylakoids­ the third membrane of the chloroplasts (disk shaped)  Chlorophyll­ gives leaves their green color, happens through photosynthesis  Granum­ a stack of thylakoids  Stroma­ the space around the granum  Light­Dependent Reactions­ (occur in the thylakoid membrane), chlorophyll +  energy (from sunlight) = chemical energy (with the use of H2O Water)  5    The Light­ Dependent Reactions of Photosynthesis  CREST WAVELENGTH  Electromagnetic Spectrum­ range of all possibiTROUGH of radiation wavelengths  Long Wavelength (stretched out) = less energy contained   Short Wavelength= more energy contained  Plants only absorb visible light for photosynthesis  Visible Light is the rainbow colors to the human eye  Violets and blues have short wavelengths=higher energy   Red has a longer wavelength= lower energy  Any organism that performs photosynthesis has a pigment called chlorophyll a  (green color)  Absorbs wavelength from blue and red= green  Chlorophyll b absorbs blue and red­orange  Absorption Spectrum­ pigments can be categorized with a specific wavelength=  visible light  Photosystem­ groups pigment molecules and proteins  Photon­ a portion of light energy  Photosystem I takes in a second photon= NADPH molecule= the energy carrier  for the Calvin Cycle 5.3 The Calvin Cycle  Fixes CO2= carbohydrate molecules  RuBisCO­ CO2 + RuBP= 6 Carbon Molecule= 3 Carbon Molecule  ATP + NADPH= G3P  Photosynthesis balances with cellular respiration  Plants re able to perform photosynthesis and cellular respiration because both  have chloroplast and mitochondria.


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