Question

3) Diffusion of starch will be tested for using the _test. In the absence of starch it will produce a yellow amber color of the reagent. 4) The presence of glucose can be detected using which requires minutes of boiling. 5) The plant, Elodea, will be used in today's lab to study 6) To estimate the osmolarity of potatoes, we will use the solutions as an indirect measure.

Answer 1

Ans 3. Difussiin of starch is tested using iodine test. In the absence of starch it will produce a yellow Amber color of reagent and in the presence of starch it will produce a blue black color indicating positive test result.

4. presence of glucose is tested by Benedict's test. Positive benedicts test is when the solution turns orange to red on heating for a few minutes, negative is when the solution remains blue or green.

5. Plant elodea is used to study plasmolysis

The plant cell is placed in 20% Nacl solution. This will be Hypotonic to the cell so the cell will lose water to outside environment and it will shrink and pull away from the cell wall.

6. To estimate the osmolality of potatoes we will use different concentration of sucrose solution.

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