5090_w07_qp_2
A paper of Biology, 5090
Questions:
8
Year:
2007
Paper:
2
Variant:
0
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1
shows a plant in a beaker containing a solution of dye. shows the tissues of the same plant as they would appear if a cross section is taken at X. cover which supports the stem solution of dye X cross section at X, magnified Fig.1.2 On , shade the tissue that would be most heavily stained by the dye. Name this tissue Explain the processes occurring in the plant that cause the dye to move upwards through the stem. Examiner’s Use Describe the process responsible for the uptake of the dye into the roots of the plant. Suggest and explain what would happen to a plant if its roots are submerged in a concentrated salt solution for six hours.
3. Movement into and out of cells  →  3.1. Diffusion and osmosis
7. Transport in flowering plants  →  7.1. Uptake and transport of water and ions
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2
Use In living organisms, enzymes may be used in reactions to convert large molecules into smaller ones. State the term used for all molecules on which enzymes act, molecules that are formed in a reaction. For a chemical reaction that begins in the stomach, state the original large molecule, the stomach enzyme involved, the smaller molecules formed. is part of a graph showing how the rate of an enzyme-controlled reaction changes with increasing temperature. temperature / °C rate of reaction / arbitrary units Complete the graph in to show how the rate of this enzyme-controlled reaction changes as the temperature is increased from 20°C to 80°C. Examiner’s Use shows diagrammatically how an enzyme-controlled reaction may occur. A Identify region A on . State the hypothesis illustrated in .
5. Enzymes  →  5.1. Enzyme action
5. Enzymes  →  5.2. Effects of temperature and pH
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4
Use Name the mineral ion required for the manufacture of the pigment in red blood cells. shows some red and white blood cells from a bird. (All cells are drawn to the same magnification.) two red blood cells of a bird, in surface view (1 m = mm) 14 m two white blood cells of a bird By reference to , complete Table 4.2 to show three differences between the red blood cells of birds and mammals. Table 4.2 red blood cells birds mammals Examiner’s Use shows human blood cells in a type of blood vessel (B) passing between body cells. body cells blood vessel B blood cells flowing smoothly blood cells, flowing in pulses E D C C Name the type of blood vessel labelled B and give reasons for your answer. type of blood vessel reasons Name the liquid leaving the blood vessel at C. Using information from , explain why blood is under higher pressure at point D than at point E.
11. Transport in humans  →  11.4. Blood
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5
Use shows the sequence in which a farmer grows three crops on the same piece of land over a number of years. Maize, grown for its edible fruits Bean, grown for its edible seeds Potato, grown for its edible tubers new tuber genetically identical to parent Name a structure always present as part of a fruit that is never present in a seed. Examiner’s Use Complete Table 5.2 to show whether each crop is produced as a result of asexual or sexual reproduction. In each case, explain your answer by stating how each is formed. Table 5.2 type of reproduction explanation seeds of bean fruits of maize tubers of potato Explain the importance, other than crop production, of including the bean plant in the sequence shown in Fig 5.1.
16. Development of organisms and continuity of life  →  16.3. Sexual reproduction in plants
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