5090_s16_qp_21
A paper of Biology, 5090
Questions:
9
Year:
2016
Paper:
2
Variant:
1
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1
shows a plant with a magnified transverse section (TS) of the root and an incomplete, magnified transverse section (TS) of the stem. incomplete, magnified transverse section (TS) of stem magnified transverse section (TS) of root The transverse section of the root in shows the distribution of xylem and phloem tissue. Using a labelling line and the letter X, show, on , the location of the xylem tissue in the transverse section (TS) of the root. Complete the transverse section (TS) of the stem in to show the distribution of xylem and phloem tissue. Using a label line and the letter P, show the location of the phloem tissue that you have drawn. State the functions of phloem tissue.
7. Transport in flowering plants  →  7.2. Transpiration and translocation
6. Plant nutrition  →  6.2. Leaf structure
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2
Dry mass is the mass of all chemicals, excluding water, present in an organism. shows the stages of germination of a seed. also shows the changes in dry mass of the plant during these stages of germination. stage A stage B stage C D E + – change in dry mass time Name the parts labelled D and E in . D ………………………………………………… E ………………………………………………… Describe and explain the changes in dry mass shown during each of the stages A, B and C in . stage A stage B stage C Water is needed for germination of seeds. State two other conditions needed for germination. Explain why each condition is needed. condition explanation condition explanation
16. Development of organisms and continuity of life  →  16.3. Sexual reproduction in plants
3. Movement into and out of cells  →  3.1. Diffusion and osmosis
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3
Digestion in the human alimentary canal is carried out by the action of enzymes. Each food group is the substrate for a specific enzyme. shows diagrams that each represent the action of a specific enzyme to break down a substrate into one or more end products. Diagram F in has been completed for you. Complete diagrams G and H in . diagram F diagram G diagram H name of enzyme where enzyme acts protease substrate protein end product amino acids small intestine name of enzyme where enzyme acts substrate starch end product maltose name of enzyme where enzyme acts substrate end products lipase Amino acids are the end products of protein digestion. Describe what happens to these amino acids from the point of digestion until they reach the liver.
8. Human nutrition  →  8.2. Human digestive system
5. Enzymes  →  5.1. Enzyme action
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4
shows the stages in the process of genetic engineering to produce the hormone insulin. isolated DNA with insulin gene isolated plasmids DNA plasmid DNA thread bacterial enzyme cuts the plasmid insulin gene inserted into the plasmid isolated insulin gene transformed plasmid inserted into bacterium to form transformed bacterium reproduction of the bacterium production of insulin human cell bacterium stage K stage L stage M stage N Describe how the location and organisation of genetic material in the human cell shown in stage K of is different from that in the bacterial cell shown. Use your knowledge of bacterial cells to name two structures that the transformed plasmid must pass through to form a transformed bacterium in stage L of . ……………………………….………… and ………………………………….… State the type of reproduction that takes place in stage M of . Use your knowledge of the process of cell division to explain why it is important that this type of reproduction occurs. type of reproduction explanation Name the condition in humans that is treated using insulin produced by the bacteria in stage N of . Stage N of may take place in a container similar to that used in the large-scale production of antibiotics. State the name of this type of container. Genetic engineering can also be used to produce crop plants for humans to eat. Discuss the potential advantages and dangers of using genetic engineering to produce crop plants for humans to eat. advantages dangers
18. Biotechnology and genetic modification  →  18.2. Genetic modification
18. Biotechnology and genetic modification  →  18.1. Biotechnology
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5
Malaria is a disease caused by a parasite that is transmitted from one person to another by a vector. Name the vector of the parasite that causes malaria. Spread of the vector may be controlled by using an insecticide. State two other ways of controlling the spread of the vector. Resistance to the insecticide can appear in the vector population. Describe how the process of natural selection may bring about resistance of the vector to insecticide.
12. Disease and immunity  →  12.1. Disease
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6
Enzyme Q is active in the human alimentary canal. shows the effect of pH on the rate of reaction of enzyme Q. pH rate of reaction / arbitrary units Use the information in to name the region of the alimentary canal where enzyme Q is active. ………………………………………………… Use your knowledge of the ‘lock and key’ hypothesis of enzyme action to explain why enzyme Q is active only in this region of the alimentary canal and not in any other region. All enzymes contain carbon. List three other chemical elements that must be present in each molecule of an enzyme.
5. Enzymes  →  5.1. Enzyme action
5. Enzymes  →  5.2. Effects of temperature and pH
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7
Describe how the nitrogen cycle makes nitrogen in the air available for both plant and animal protein. Nitrogen can also be made available in the form of nitrogen-containing fertilisers. Describe the possible effects of using nitrogen-containing fertilisers on each of the following: the production of crops by farmers, the environment.
19. Relationships of organisms with one another and with the environment  →  19.2. Nutrient cycles
6. Plant nutrition  →  6.3. Mineral nutrition
19. Relationships of organisms with one another and with the environment  →  19.4. Effects of humans on ecosystems
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