How can we show that only the green parts of the leaf produce starch in photosynthesis? We know that the plant converts the simple sugars made in photosynthesis.

Slides:

Advertisements

Similar presentations

Advertisements

Noun. Verb Activity The process of adsorb(v) light(n) energy(n) by chlorophyll(n) and transform(v) it into chemical(adj.) energy(n) for use(v) in the.

Cellular Activities In Plants. Anacharis: A Light-Dark Comparison.

What sorts of carbohydrates do plants make? Glucose and other sugars such as sucrose and fructose are soluble so need to be linked together in long chains.

Photosynthesis Describe, using a word equation, how plants make their own food through photosynthesis.

Photosynthesis In these lessons we will: » Revise photosynthesis » Use a practical activity to look at the conditions needed for photosynthesis to happen.

Amanda Matsumura Nathan Marcy Alisa Craig Tim Waldrip Dr. Ellen Turner, Instructor.

BY ZAINAB BINTI ARIFFIN 90286

Chlorophyll Scientific Enquiry Dave Crowley, 2008.

Photosynthesis Practical sheets. Photosynthesis Learning objectives: ◦ By the end of the lesson you should be able to:  Describe what the glucose made.

Lab 4 1-(Prove the importance of chlorophyll in photosynthesis). 2-Prove the production of starch during the process of photosynthesis 3-Prove the activity.

PHOTOSYNTHESI S: A LABORATORY EXPERIMENT THEORETICAL BACKGROUND EXPERIMENT CONCLUSIONS introduction procedure results.

We will learn The factors that affect the rate of plant growth.

Separating Salt and Sand and Water

Evidence of Photosynthesis

PH Test. 1. Label the three beakers with their respective names (do not include the buffer; this can be tested in the tube). 2. Fill the beakers with.

Writing the method stage in a Lab Report Investigating whether light is needed for photosynthesis.

© KCL/PENTECH/WCED 2000 Day length Plants making food 1. Joe lives for basketball. He plays basketball every morning. He eats breakfast after playing,

Photosynthesis and Plant Responses

Photosynthesis.

Starter Activity: Draw a line down the middle of your show me board. On one side, you must write all the advantages of genetic engineering, and on the.

EXPERIMENT: Action of Amylase on Starch. A B C D E F G Add 10 ml of distilled water to each tube.

Revision: B4 Photosynthesis PEHN. Section of a leaf.

Shung Tak Catholic English College W.Y.Chan Experiments on photosynthesis Destarching  Starch is a detectable product of photosynthesis.  Presence.

 Test for simple (reducing) sugars  Benedict’s is blue  Put test substance in a test tube with distilled water and a few drops of Benedict’s  Heat.

4.1 (a) To conduct a qualitative test for starch.

World of Plants Sub topic (c) Making food. Food Webs and Plants Animals get their food by eating other living things. Herbivores eat plants. Carnivores.

Biology 2 Packet II Lab Food Production in Plants.

Starter Activity: Name three uses of bacteria which help humans.

Exploring how plants make food

Metabolic Pathways of Plants Nathan J. Smith Undergraduate in WFS Tennessee Technological University Cookeville, TN

Light as a Factor in Photosynthesis

Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods.

Testing a leaf for starch.

The Mysterious Tree

S2 Chemistry Rates of Reactions.

Learning Outcomes To re-cap on your photosynthesis knowledge from S2

Test for Glucose All the monosaccharides (e.g. glucose) and many of the disaccharides are classed as reducing sugars. Benedict’s test is used to determine.

Testing foods for starch.

The test for glucose Benedict's Test.

Photosynthesis.

LI :To investigate the presence of starch in leaves

PHOTOSYNTHESIS.

Photosynthesis Lesson Objectives:

What do we need to digest our food?

Ardrossan Academy Dead Earth

Plant nutrition Method of nutrition used by plants is: photosynthesis.

Plants at work J E F Frost Plants at work.

Pg14 Spores Q1 Family Genes Classifiy Species name Segments Offspring

Practical work in Biology

Photosynthesis Chapter 13.

Corn Mash and Distillation

Food Groups Tests.

PHOTOSYNTHESIS.

Photosynthesis In these lessons we will: Revise photosynthesis

Photosynthesis Describe how plants make their own food using photosynthesis. Give the word equation for photosynthesis. Show that starch is produced by.

Movement through a Membrane.

Variegated plants grow slower than normal ones because

Starter Activity: Divide the following into biotic and abiotic factors: Soil moisture, grazing, food availability, air temperature, light intensity, disease,

Lesson starter Complete page 7 in your booklet:

Leaf Challenge! Cell wall Nucleus Chloroplast Cell membrane Vacuole

Bell ringer Risk Assessment Food tests

4.1 (a) To conduct a qualitative test for starch

Plant Stores D. Crowley, 2008.

plants and photosynthesis

Presentation transcript:

How can we show that only the green parts of the leaf produce starch in photosynthesis? We know that the plant converts the simple sugars made in photosynthesis into starch for storage. Why don’t we look to see if there is any starch in the non-green areas of the leaf?

Take a variegated plant which has been under bright light for 24hours and remove one of the leaves. Make a sketch of the leaf showing approximately where the green and non green areas are.

Half fill a 250 ml beaker with water and bring it to the boil using a Bunsen burner, tripod and gauze. Place the leaf in the boiling water for one minute to get rid of the waxy coating on the leaf.

Turn off the Bunsen burner (this is very important because you will now be using a flammable substance). Collect a boiling tube and place the leaf from the boiling water into the tube. Pour ethanol into the tube until about one third full. Place the boiling tube with ethanol and the leaf inside the beaker of hot water and leave for 5-10 minutes. The ethanol will remove the colour from the leaf because the chlorophyll is soluble in the ethanol.

Pour off the ethanol into a clean beaker and place the leaf back in the hot water just to rinse off the ethanol. Lay the leaf out on a white tile and “flood” the leaf with iodine solution. Pour off the excess iodine solution and examine the leaf carefully to see where the starch is. Record your observations.