A-Level BiologyYear 2019Q1
page 02 Total marks — 25 Attempt ALL questions 1. Embryonic stem cells can be used therapeutically to differentiate and replace any damaged or diseased tissue. This is because they are A multipotent and specific genes are switched on B pluripotent and all genes are switched on C multipotent and specific genes can be switched on D pluripotent and all genes can be switched on. 2. The table shows the anticodon sequence on tRNA molecules and the specific amino acid each carries. Anticodon sequence Amino acid CCA proline AAG lysine UAU tyrosine AUU isoleucine Part of the amino acid sequence of a protein is shown in the diagram. isoleucine tyrosine lysine lysine proline Triplets of DNA nucleotides that code for the sequence of amino acids in this protein are A CCA UUC UUC AUA UAA B GGT TTC TTC ATA TAA C CCA AAG AAG TAT ATT D CCA AAG AAG UAU AUU.
Paper Source:NH_Biology_all_2019.pdf
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Exam Specification Info
This question is part of the UK A-Level Biology syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.
Syllabus levelAdvanced Level (A-Level)
SubjectBiology
Official MarksVariable (2–6 marks)