Question
(a) You are provided with specimen labelled Q. Remove the endosperm and crush using a motor and pestle. Add distilled water and obtain a solution. Decant the mixture to obtain solution Q1.
Using the reagents provided, test the food present in solution Q1.
(b) Account for your observation in (a) above
(c) Name the type of germination represented in the specimen above.
Using the reagents provided, test the food present in solution Q1.
| Food substance | Procedure | Observation | Conclusion |
|---|---|---|---|
(b) Account for your observation in (a) above
(c) Name the type of germination represented in the specimen above.
Answer
(a)
(b) Starch absent; all starch hydrolysed/broken down by enzyme (diastase) into simple sugars.
(c) Epigeal germination.
| Food substance | Procedure | Observation | Conclusion |
|---|---|---|---|
| Starch; | Put 2cm3 of test solution in a test tube, add 3 drops of iodine solution | Brown colour of iodine solution persists | Starch absent |
| Reducing sugar | Put 2 cm3of test solution in a test tube. Add equal amount of Benedict’s solution, heat to boil | Orange colour observed;green, yellow | Reducing sugar present |
(b) Starch absent; all starch hydrolysed/broken down by enzyme (diastase) into simple sugars.
(c) Epigeal germination.
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