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1.1. Describe in the correct sequence the variouIS steps that were followed during a starch (6) test. 1.2. Mention one safety precaution that should be taken during this experiment. (1) 1.3. Draw a labelled diagram of the leaf showing the results of the investigation. (5) (2) .4. Provide a conclusion for the experiment.

1.1. Describe in the correct sequence the variouIS steps that were followed during a starch (6) test. 1.2. Mention one safety precaution that should be taken during this experiment. (1) 1.3. Draw a labelled diagram of the leaf showing the results of the investigation. (5) (2) .4. Provide a conclusion for the experiment.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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### Starch Test Experiment #### Experiment Steps (6 Marks) 1. **Pluck a Healthy Leaf**: Select a green, healthy leaf to be used for the experiment. 2. **Boil the Leaf**: Boil the leaf in water for a few minutes to break down cell walls. 3. **Submerge in Alcohol**: Immerse the boiled leaf in alcohol to remove chlorophyll. 4. **Re-boil Leaf**: Boil the leaf again in water to soften it. 5. **Treat with Iodine Solution**: Place the leaf in a petri dish and cover it with iodine solution. 6. **Observe Color Change**: Note the color change, which indicates the presence of starch. #### Safety Precaution (1 Mark) - **Handling Chemicals Carefully**: Wear gloves and safety goggles to protect yourself from hot water and alcohol. #### Diagram Requirement (5 Marks) - **Labelled Diagram**: Draw a clear, labeled diagram of the leaf, highlighting the areas that turn blue-black upon undergoing the test. #### Conclusion (2 Marks) - **Conclusion**: If the leaf turns blue-black, starch is present, indicating that photosynthesis has taken place within the leaf area tested. #### Additional Diagram Description - The image shows two leaves. The first leaf is depicted as a whole. The second leaf is partially covered with a strip, indicating the section being subjected to the starch test. This page is structured to guide students through conducting a starch test on a leaf efficiently and safely.
Transcribed Image Text:### Starch Test Experiment #### Experiment Steps (6 Marks) 1. **Pluck a Healthy Leaf**: Select a green, healthy leaf to be used for the experiment. 2. **Boil the Leaf**: Boil the leaf in water for a few minutes to break down cell walls. 3. **Submerge in Alcohol**: Immerse the boiled leaf in alcohol to remove chlorophyll. 4. **Re-boil Leaf**: Boil the leaf again in water to soften it. 5. **Treat with Iodine Solution**: Place the leaf in a petri dish and cover it with iodine solution. 6. **Observe Color Change**: Note the color change, which indicates the presence of starch. #### Safety Precaution (1 Mark) - **Handling Chemicals Carefully**: Wear gloves and safety goggles to protect yourself from hot water and alcohol. #### Diagram Requirement (5 Marks) - **Labelled Diagram**: Draw a clear, labeled diagram of the leaf, highlighting the areas that turn blue-black upon undergoing the test. #### Conclusion (2 Marks) - **Conclusion**: If the leaf turns blue-black, starch is present, indicating that photosynthesis has taken place within the leaf area tested. #### Additional Diagram Description - The image shows two leaves. The first leaf is depicted as a whole. The second leaf is partially covered with a strip, indicating the section being subjected to the starch test. This page is structured to guide students through conducting a starch test on a leaf efficiently and safely.
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