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5 marksStructure and Roles of Nucleic Acids

CAPE Biology Unit 1 · 2016 · Paper 2 · Question 2(a)(i)

This question focuses on the structure and role of RNA.

Using a simplified diagram of a small section of ribonucleic acid (RNA), describe the structure of RNA. Note: Details of the chemical composition of components are NOT required.

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Other parts of this question

  1. 2(a)(ii)Comment on the role of m-RNA in eukaryotes.[2 marks]
  2. 2(b)(i)Determine the genotype of EACH phenotypic category in Table 1, using the symbols given. Write your answers in Table 1.[2 marks]
  3. 2(b)(ii)Suggest a null hypothesis for the test cross in (b).[2 marks]
  4. 2(b)(iii)Complete Table 2 by writing the missing values in the relevant spaces.[2 marks]
  5. 2(b)(iv)Using the table of probabilities provided below, and with reference to the calculated Chi-square value from Table 2, evaluate the validity of the hypothesis.[2 marks]

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