4 marksFoundation
A student tests some foods for starch, sugar and protein.
.1Which solution does the student use to test for starch?
[1 mark] .2The student heats a food with Benedict's solution. The food contains a lot of glucose.
What colour does the mixture turn?
[1 mark] .3Name the solution used to test for protein.
[1 mark] .4Suggest why the student heats the Benedict's test tubes in a water bath rather than directly over a Bunsen burner.
[1 mark] 3 marksFoundation
Body cells divide in a series of stages called the cell cycle.
.1Put the stages of the cell cycle in the correct order, starting with the first.
[1 mark] .2Name the type of cell division in the cell cycle that makes two genetically identical cells.
[1 mark] .3In the nucleus of a human body cell, how are the chromosomes arranged?
[1 mark] 4 marksFoundation
Automatic control systems keep conditions inside the body within narrow limits.
.1Put the parts of a control system in order, starting with the stimulus.
[1 mark] .2What is homeostasis?
[1 mark] .3Which two internal conditions are controlled by homeostasis? Tick two boxes.
[2 marks] 3 marksFoundation
A student looks at a thin slice of leaf under a light microscope.
.1Which equation links magnification, image size and real size?
[1 mark] .2A guard cell is 0.05 mm long. In the student's drawing it is 20 mm long.
Calculate the magnification of the drawing.
[1 mark] .3An electron microscope can show ribosomes, but a light microscope cannot.
What is the reason?
[1 mark] 3 marksFoundation
Hormones are chemicals secreted by endocrine glands.
.1Name the gland in the brain that is often called the 'master gland'.
[1 mark] .2Which gland produces insulin?
[1 mark] .3How do hormones travel to their target organs?
[1 mark] 