Question

a student performed an experiment to test the hypothesis that glucose produced during photosynthesis is converted to fats and stored in seeds. the table shows the steps of the experiment performed by the student. grind 2 g of sunflower seeds to make a fine powder. put the powder in a test - tube, and add 10 ml of water. add 20 - 25 drops of sudan iii. gently shake the test - tube, and observe the color change. the student observed that the upper layer of the solution in the test tube turned red. is the students hypothesis supported by the test results? yes. the appearance of the color red indicates the presence of fats in the seeds. no. the entire solution in the test tube did not turn red. yes. glucose did not react with sudan iii and remained colorless in the lower layer. no. glucose also gives a positive test with sudan iii.

Explanation:

Step1: Understand Sudan III test

Sudan III is a dye that stains lipids red. Glucose is not a lipid and does not react with Sudan III.

Step2: Analyze the experiment

The upper - layer of the solution in the test tube turned red, indicating the presence of fats (lipids) in the sunflower seeds. Glucose is not being tested for in this experiment and has no reaction with Sudan III.

Answer:

Yes. Glucose did not react with Sudan III and remained colorless in the lower layer.