BIOLOGICAL CONCEPTS LAB
BIOLOGICAL CONCEPTS LAB BIOZ 101
Virginia Commonwealth University
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This 2 page Class Notes was uploaded by Tara Sporer on Wednesday October 28, 2015. The Class Notes belongs to BIOZ 101 at Virginia Commonwealth University taught by Staff in Fall. Since its upload, it has received 22 views. For similar materials see /class/230601/bioz-101-virginia-commonwealth-university in Biology at Virginia Commonwealth University.
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Date Created: 10/28/15
Exercise 4 Photosynthesis Using Light to Make Food Section A Photosynthesis 7 Overview Section B Leaves and Chloroplasts are A 39 Plants are autotrophsproducers Photosynthesis converts light energy into chemical energy to form glucose Overall reaction 6C0 6 H20 energy gt C5H1205 602 Carbon dioxide Water Light energy gt Glucose Oxygen The oxygen is formed by the break down of H20 molecules and it is formed as a byproduct Photosynthesis occurs in the chloroplasts and is involved in two reactions 0 Light reaction capturing energy from the sunlight and using it to make ATP amp NADH molecules that can store energy it occurs in the thylakoids and granna 0 Dark reaction Calvin Cycle use COz amp ATP to make organic molecules such as glucose it occurs in the stroma of the chloroplast for Photosynthesis Epidermis upper amp lower secrets cuticles that forms a waxy layer to prevent water loss Stoma stomata pl poreopening controls gas exchange amp evaporation of H20 Mesophyll between the upper and lower epidermis a multilayer tissue Vascular bundles functions in transporting water minerals and products of photosynthesis Palisade mesophyll also called Palisade parenchyma major site for photosynthesis also carries out gas exchange function Spongy mesophyll also called Spongy parenchyma major site for gas exchange also carries out photosynthesis Chloroplasts photosynthesis occurs within the thylakoids amp granna COz xation occurs in the stroma Section C Visible Light Drives the Light Reaction Light reaction 12H20 gt 602 24H 24e39 Light is an example of electromagnetic radiation energy that transmitted as discrete particles called photons The visible light spectrum is the energy of certain wavelengths that produces light visible by human eyes The longer the wavelength the lower the energy on the other hand the shorter the wavelength the higher the energy Section D Photo stems C ture Solar Ener Atom at it s ground Heat analLight state stable As the photon hits the statestable energy atom at electron is being bumped into the next energy levelorbit The 0quotquot electron gains potential energy but is very unstable level the demons As the electron moves back down o round state the potential energy is lost in the form ofheat energy has been converted to light then the light emitted you observed will have high energy However only a portion ofthe total energy is being converted to light so the light emitted has a lower energy Section E Photosynthetic Pigm ents o Three basic types ofplant pigments o chlorophyll o Carotenoids o Phycocyanins was t c 39c th energycapturee iciencyoftheplant o Know the light each pigment absorbs andthe color it re ects o Chromawgraph which 3 Paper chromatography 7 echnique used to separate the various components of a liquid mixture quot1 quot 39 39 T pape tatioua piiasemidthei different rate ofsolubility in the solvent moving phase p quot 39 affinity 39L L T papa will migrate slower than molecules that have low affinity with the chromatography paper