CAPE Biology Unit 1 · May/June 2021 · Paper 2

17 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. 1(a)8 marksConstruct an annotated diagram of the E. coli bacterium from Figure 1 in the space provided, showing the magnification of the diagram.
2. 1(b)(i)3 marksList three similarities between a typical animal cell and a typical plant cell.
3. 1(b)(ii)4 marksOutline the function of any two structures found only in plant cells.
4. 1(c)15 marksDiscuss three differences in the structure of starch and cellulose.
5. 2(a)(i)5 marksProvide labels on Figure 2 to identify the components labelled S, T, U, and V.
6. 2(a)(ii)1 markDraw a circle around a section of Figure 2 to identify a single nucleotide.
7. 2(a)(iii)1 markState how two nucleotides in a DNA molecule are held together.
8. 2(a)(iv)4 marksOutline the roles of messenger RNA (mRNA) and transfer RNA (tRNA) in polypeptide synthesis in eukaryotic cells.
9. 2(b)(i)1 markName the type of change in the gene that causes the production of abnormal haemoglobin in individuals with sickle-cell anaemia.
10. 2(b)(ii)3 marksOutline how low oxygen saturation causes red blood cells to change into a sickle shape.
11. 2(c)(i)3 marksAnalyse the success of the gene therapy treatment for sickle-cell anaemia using the data presented in Figure 3.
12. 2(c)(ii)12 marksDiscuss three challenges that may limit the success of gene therapy as an effective medical treatment for diseases.
13. 3(a)(i)5 marksPlot the data from Table 1 as a line graph on the grid provided on page 17, placing the day of the cycle on the x-axis.
14. 3(a)(ii)4 marksOutline the roles of LH and FSH in the maturation and release of the secondary oocyte during the menstrual cycle.
15. 3(b)4 marksOutline the process of blastocyst implantation in the uterus following fertilization, including the hormonal influences involved.
16. 3(c)(i)2 marksState the developmental change in each of the labelled structures, A and B, during the transition from floral tissues to fruit tissues.
17. 3(c)(ii)15 marksDiscuss three advantages of asexual reproduction in plants for agriculture, including one limitation for each advantage discussed.