9700_s23_qp_11
A paper of Biology, 9700
Questions:
40
Year:
2023
Paper:
1
Variant:
1
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3
Four students were asked to match the function with the appearance of some cell structures in an animal cell. The functions were listed by number. synthesis of polypeptides synthesis of lipids packaging of hydrolytic enzymes that will remain in the cell The appearances were listed by letter. V membranes which surround an enclosed inner cavity W non-membrane-bound, spherical structures X a double membrane interspersed with pores Y non-membrane-bound, cylindrical structures Z membrane-bound sacs, arranged as a flattened stack Which student correctly matched the numbered function with the appearance of the cell structure?
1. Cell structure  →  1.2. Cells as the basic units of living organisms
2. Biological molecules  →  2.2. Carbohydrates and lipids
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13
The graph shows the effect of an increasing substrate concentration on the rate of an enzyme-catalysed reaction. rate of reaction substrate concentration maximum rate of reaction P Q Line P represents the result when the enzyme is used at its optimum pH and optimum temperature and without an inhibitor. Line Q represents the result when the reaction conditions are changed. Which descriptions of changes to the reaction conditions could result in line Q if all other conditions were kept the same?
3. Enzymes  →  3.2. Factors that affect enzyme action
3. Enzymes  →  3.1. Mode of action of enzymes
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16
The table compares the surface area to volume ratios of five agar blocks that differ in dimensions but which all have the same volume. The agar blocks can be used to measure the efficiency of diffusion, where efficiency is measured as the time taken for a dye to reach all parts of the block. length / mm width / mm height / mm surface area / mm2 volume / mm3 surface area : volume ratio 0.75 1.3 1.1 0.5 4.1 1.5 Which prediction can be made about the way in which size and dimensions of these blocks affect the efficiency of diffusion?
4. Cell membranes and transport  →  4.2. Movement into and out of cells
13. Photosynthesis  →  13.2. Investigation of limiting factors
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37
Some of the processes which result in the formation of a population of bacteria that are resistant to a new antibiotic are listed. change in reproductive success of bacteria increase in frequency of the resistance allele in the population increase in genetic variation within the population random mutation occurs in bacterial DNA What is the correct order of these processes?
17. Selection and evolution  →  17.2. Natural and artificial selection
10. Infectious diseases  →  10.2. Antibiotics
6. Nucleic acids and protein synthesis  →  6.2. Protein synthesis
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38
When bacteria are grown in a Petri dish containing discs with antibiotics, there will be zones of inhibition of bacterial growth. antibiotic disc zone of inhibition area of bacterial growth The chart shows the size of the zones of inhibition when a species of bacteria was incubated on five different plates of agar, each containing a disc with a different antibiotic. zone of inhibition / mm antibiotic Which conclusions can be made about the most and least effective antibiotics on this species of bacteria?
10. Infectious diseases  →  10.2. Antibiotics
17. Selection and evolution  →  17.2. Natural and artificial selection
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