4 marksFoundationRequired practical 034.2.2.1 The human digestive system
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 marksFoundation4.1.1.5 Microscopy
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] 4 marksFoundation4.1.3.1 Diffusion4.1.3.3 Active transport
Substances move into and out of cells by diffusion, osmosis and active transport.
.1Which statement describes diffusion?
[1 mark] .2Which two changes would increase the rate of diffusion of oxygen into a cell? Tick two boxes.
[2 marks] .3Root hair cells take in mineral ions from very dilute soil water. Which process do they use?
[1 mark] 3 marksFoundation4.4.1.1 Photosynthetic reaction
Plants make their own food by photosynthesis.
.1Which word equation shows photosynthesis?
[1 mark] .2Photosynthesis is an endothermic reaction. What does this mean?
[1 mark] .3Name the green substance in chloroplasts that absorbs light.
[1 mark] 3 marksFoundation4.2.3.1 Plant tissues4.2.3.2 Plant organ system
A leaf is a plant organ made of several tissues.
.1What is the main function of the palisade mesophyll tissue?
[1 mark] .2Name the tissue that carries water from the roots to the leaves.
[1 mark] .3What does phloem tissue transport?
[1 mark] 