Biology Photosynthesis Lab - 934 Words

Biology lab AIM: To test a leaf for starch APPARATUS/MATERIALS : * bunsen burner, tripod stand, wire gauze(OR 90oC electric water bath OR hot plate) * 250 cm3 beaker * boiling tube * anti- bumping granules * forceps * test tube holder * white tile * leaf to be tested (hibiscus leaves are excellent) * 90% ethanol * iodine/potassium iodide solution PROCEDURE: The video above shows the steps in Testing a Leaf for the Presence of Starch. The Procedure outlined below is slightly different. 1. Remove a green leaf fom a plant that has been exposed to sunlight for a few hours 2. Half-fill a 250cm3 beaker with water. Heat the water until it boils. Keep the water at boiling point. 3. Use the†¦show more content†¦Most photosynthesis takes places in the green parts of plants, in particular the leaves. Photosynthesis involves 2 stages - the Light-dependent Stage and the Light-independent stage. In the light-depedent stage, water is photolyzed by sunlight into Hydrogen and oxgen. Hydrogen enters the second stage, oxgen is gaseous by-product. In the light - independent stage enzymes catalyse the reduction of carbon dioxide by hydrogen. The carbohydrate, glucose is first formed. Glucoe may be immediately used, translocated in the form of fructose or sucrose or stored as starch granules. The overall equation for photosynthesis is: 2. Which organic substance does iodine/potassium iodide solution detect the presence of? What observations will you make if the test is positive? Starch. The iodine solution will turn from brown to blue - black. 3. Explain the significance of boiling the leaf in water. Boiling the leaf in water: * Removes the waxy cuticle which prevents entry of iodine/potassium iodide solution. * Ruptures cell membranes to make starch granules in cytoplasm and chloroplasts accessible to iodine/potassium iodide solutiion. Cell membranes are selectively permeable and do not readily allow the penetration of iodine. * Denatures enzymes, particularly those which convert starch to glucose e.g. diastase. Boiling arrests all chemical reactions, since enzymes which catalyse the reactions areShow MoreRelatedBiology Photosynthesis Lab925 Words   |  4 PagesBiology lab AIM: To test a leaf for starch APPARATUS/MATERIALS  : * bunsen burner, tripod stand, wire gauze(OR 90oC electric water bath OR hot plate) * 250 cm3 beaker * boiling tube * anti- bumping granules * forceps * test tube holder * white tile * leaf to be tested (hibiscus leaves are excellent) * 90% ethanol * iodine/potassium iodide solution PROCEDURE: The video above shows the steps in Testing a Leaf for the Presence of Starch. The Procedure outlined below isRead MoreThe Analysis of Spinach Pigmentation During Photosynthesis (biology Lab Report)1050 Words   |  5 PagesSpinach Pigmentationp During Photosynthesis p University of Alabamap I. Introduction:p quot;Photosynthesis is the conversion of light energy to chemical energy that is stored in glucose or other organic compounds; it occurs in plants, algae, and certain prokaryotesquot; (Campbell, G-16). The formula below is photosynthesis and quot;the ingredients necessary to make a plant growquot; (KoK, 30).p 6CO_2 + 6H_2_0,,#179; C_6_H_12_O_6_ + 6CO_2p Photosynthesis occurs within chloroplasts whichRead MoreThe Effect of Temperature on Photosynthesis1085 Words   |  5 Pagesproduct of photosynthesis, which is the process that converts energy in sunlight to chemical forms of energy that can be used by biological systems2. Many organisms are not able to use the energy obtained from sunlight directly; however, plants are able to use this energy and convert it into chemical energy by converting CO2 (carbon dioxide) and H2O (water) to organic materials3. The energy source for photosynthesis comes from sunlight, which allows for the fuel that drives photosynthesis. This processRead MoreLab Report on Photosynthesis Essay1251 Words   |  6 PagesLab Report: Understanding Photosynthesis Gen Biology Lab Abstract: This lab was called photosynthesis: understanding photosynthesis. It is a highly complex process that needs to be broken down in many steps to understand how it works. This lab covers the big components in photosynthesis including carbon dioxide intake, light consumption, and varying pigmentation. Introduction: Photosynthesis is a huge concept to learn and understand in the field of biology. Plants have their own specialRead MorePhotosynthesis Lab Report866 Words   |  4 Pages Photosynthesis Lab 8 Section 022 Kaileen Savage Tanushree Majumber Introduction â€Å"Photosynthesis is a biochemical process for building carbohydrates using energy from sunlight and carbon dioxide taken from the air†, (Morris, J. (2016) Biology How Life Works. New York, NY.). It is a system that uses plants and specific algae to synthesize molecules from both water and carbon dioxide. The oxygen we breathe and the food we eat is fueled by photosynthesis because it is anRead MorePhotosintersis Experiment1317 Words   |  6 PagesMeasuring the Effect of Light Intensity on Photosynthesis Introduction Photosynthesis captures energy from sunlight. Plants, algae, and some bacteria use the energy captured during photosynthesis for their metabolic reactions. During photosynthesis in plants, chlorophyll and enzymes in leaves convert certain wavelengths of light into chemical energy. A simple equation can be used to represent photosynthesis. Enzymes and Chlorophyll light energy CO2 H2O carbohydrate O2 In this investigationRead MoreLeaflab Report Essay943 Words   |  4 PagesMarlena Ferone LeafLab Biology 101 - Professor Landry University of Phoenix Due Date: August 30, 2011 EXPLORATION What is the relationship between the increase in light intensity and the photosynthetic rate in leaves from a corn plant? How does this relationship compare with what you observed for tomato plants? As light intensity increases, the photosynthetic rate of a plant increases as well. However biochemical reaction, in fact, DO have temperature limits because if the temperaturesRead MoreLeaf Lab931 Words   |  4 PagesMarlena Ferone LeafLab Biology 101 - Professor Landry University of Phoenix Due Date: August 30, 2011 EXPLORATION What is the relationship between the increase in light intensity and the photosynthetic rate in leaves from a corn plant? How does this relationship compare with what you observed for tomato plants? As light intensity increases, the photosynthetic rate of a plant increases as well. However biochemical reaction, in fact, DO have temperature limits because if the temperaturesRead MoreWorld War Ii Through the 1970s627 Words   |  3 PagesENERGY IN A CELL Lab Name: Tigist Badeg Data Table. Step | Tile | 1. | Energy | 2. | H2O, CO2, Chlorophyll | 3. | Electron Transfer | 4. | ATP + NADPH | 5. | Calvin cycle | 6. | Glucose and O2 | 7. | Glycolysis | 8. | Pyruvic acid | 9. | Krebs cycle | 10. | ATP, H2O and CO2 | 1.What is the importance of the light and dark reactions in photosynthesis? In light reactions, light is absorbed by chlorophyll in the thylakoid membrane and energizes the electronsRead MoreIB Bio lab report on photosynthesis1509 Words   |  7 PagesThe effect of different coloured lights on the rate of Photosynthesis Objective: To find out which colour of light provides the best consequences for the production of oxygen/ the rate of photosynthesis Background: In photosynthesis, there are two main parts, including light dependent and light-independent reactions. Plants use the energy from light for producing sugar, which is being converted into ATP by cellular respiration. They also are the only organisms that produce oxygen along with glucose