This question is divided into three parts:
Plants lose water by transpiration.
The rate of transpiration is influenced by environmental conditions, including wind speed.
The rate of transpiration can be measured using a potometer.
Plan an investigation to determine the effect of wind speed on the rate of transpiration in a single species of leafy shoot that would allow valid data to be collected.
Details of how to set up the potometer are not required.
Starch is the primary storage carbohydrate in plants, consisting of amylose and amylopectin. Both are polymers of α\alphaα-glucose.
Give three properties of starch that make it highly suitable as a storage molecule in plant cells.
Starch is digested in the human digestive tract by the enzyme amylase.
Explain whether the action of amylase in the digestive tract is intracellular or extracellular.
16 exam-style questions on OCR A A Level Biology Planning. Each one has a worked solution and a mark scheme showing where the marks go.