Table 2 shows the students' results Table 2 Test & }(c) Leaf from plant kept in light for four days & Leaf from plant kept in light for two days and then no light for two days Glucose & Strong positive & Weak positive Starch & Positive & Negative 6 Explain why the leaf in the light for four days contained both glucose and starch [2 marks]

## Step 1: Understanding the QuestionThe question asks us to explain why the leaf that was kept in light for four days contained both glucose and starch. ## Step 2: Understanding PhotosynthesisPhotosynthesis is the process by which green plants convert light energy, usually from the sun, into chemical energy in the form of glucose. This process requires light, water, and carbon dioxide. ### The formula for photosynthesis is: ** **## Step 3: Understanding Glucose and Starch ProductionDuring photosynthesis, glucose is produced. Some of this glucose is used by the plant for its metabolic activities, while the rest is converted into starch and stored. The conversion of glucose to starch is a way for the plant to store excess glucose that it does not immediately need. ## Step 4: Application to the QuestionThe leaf that was kept in light for four days was able to perform photosynthesis continuously for this period. As a result, it produced glucose and, due to the excess glucose produced, also converted some glucose into starch for storage.