Exam specific answers

Question 1

explain 1 way in which starch molecules are adapted for their function in plant cells? (2)

Answer 1

insoluble so they don’t affect water potential
helical structure so compact
large molecule so cannot leave cell

Question 2

explain how cellulose molecules are adapted for their function in plant cells? (3)

Answer 2

they are made up of long and straight chains which become linked by many hydrogen bonds to form fibrils, so they provide strength to the cell wall