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Figure 1 shows the growth pattern followed by a type of tumour - AQA - A-Level Biology - Question 6 - 2019 - Paper 3
Question 6
Figure 1 shows the growth pattern followed by a type of tumour. You will need to use the ‘#’ button on your calculator. Figure 2 can also be used to calculate the ... show full transcript
Worked Solution & Example Answer:Figure 1 shows the growth pattern followed by a type of tumour - AQA - A-Level Biology - Question 6 - 2019 - Paper 3
Step 1
Calculate Percentage of Maximum Growth
Answer
To calculate the percentage of maximum growth, first identify the maximum size of the tumour from the graph (Figure 1). Suppose the maximum size reached is around 10 units. If at a certain time the tumour size is 5 units, the percentage can be calculated as follows:
Step 2
Calculate Tumour Size
Answer
Using the data provided in the figures, if the growth of the tumour described can be estimated to follow the indications of dibasic acid concentration, you would use the relevant formula from your calculator, inputting the required values from the provided equations in Figure 2.
Step 3
Suggest How Tricet Does Cell Division
Answer
Tricet acts as a competitive inhibitor of enzymes, specifically targeting dihydrofolate reductase which is responsible for DNA synthesis. By inhibiting this enzyme, Tricet reduces the availability of nucleotides necessary for DNA replication, leading to a reduction in cell division. Fewer enzyme-substrate complexes form, which decreases cellular proliferation.