Required Practical 4

Question 1

You were provided with beetroot discs that were washed thoroughly before the start of the investigation. Explain why it was important to wash beetroot discs

Answer 1

to wash off any excess pigment on the discs

Question 2

Explain why you were instructed to shake the test tubes every minute

Answer 2

Expose all surfaces to the alcohol

Question 3

Explain why you were instructed to pour the alcohol immediately from the experimental test tube into a clean test tube

Answer 3

So all the discs were in contact with the alcohol for the same time

Question 4

Explain why your results would be different if you cooked your beetroot

Answer 4

Cooking would damage the membrane

Question 5

Suggest why the students results were different

Answer 5

Variation in judging the colour

Question 6

Give three environmental variables that should be controlled when growing the plants before treatment with the different sprays

Answer 6

Temperature
Light intensity
Soil pH