Question 1 Marks: 1 Which of the following steps is not involved in the process of transcription?The DNA double helix separates into single strandsDNA polymerase binds to one of the single strands and moves along the geneFree RNA nucleotides are joined together by covalent bondsThe RNA molecule detaches from the DNA template strand at the end of the gene Key Concepts Transcription Next Question
Question 2 Marks: 1 The following diagram shows the process of translation. Which row of the following table correctly identifies the labelled components? P Q R S A. anticodon codon ribosome mRNA B. codon anticodon ribosome tRNA C. anticodon codon ribosome tRNA D. codon anticodon mRNA ribosome Key Concepts TranslationCodons & Anticodons Previous QuestionNext Question
Question 3 Marks: 1 In a genetic engineering experiment, a piece of double-stranded DNA containing 18 000 nucleotides coding for a specific polypeptide is transcribed and translated. What is the total number of amino acids in this polypeptide?3 0006 0009 00018 000 Key Concepts Codons Previous QuestionNext Question
Question 4 Marks: 1 A section of a DNA molecule contains the following base sequences: ATA CCT GCA Which of the following would represent the base sequences of the codons on the mRNA molecule after transcription?ATA CCT GCAAUA CCU GCATAT GGA CGTUAU GGA CGU Key Concepts Determination of mRNA Base SequenceTranscription Previous QuestionNext Question
Question 5 Marks: 1 Which one of the following would not be an advantage of using bacteria to produce human insulin?Some bacteria can survive at very high temperatures, which will make the insulin less likely to denatureThe insulin produced by the genetically modified bacteria is identical to human insulinBacteria uses the same genetic code as humans which makes gene transfer possible between the speciesBacteria can produce large quantities of insulin in a relatively short amount of time Key Concepts Production of Human Insulin Previous Question