In a genetic analysis laboratory, a polymerase chain reaction (PCR) is used to amplify a specific gene sequence. Each cycle of the PCR takes 6 minutes to complete, at the end of which the number of double-stranded DNA templates has doubled.
Starting with a sample containing 25 DNA templates, calculate the total number of templates that will be present after 1.5 hours, assuming maximum amplification efficiency and no degradation.
97 exam-style questions on OCR GCSE Biology 5.1 Inheritance, covering 5.1.1 The genome, 5.1.2 Environment and phenotype, 5.1.3 Variants and mutations, 5.1.4 How genetic variants influence phenotype, 5.1.5 Asexual and sexual reproduction, 5.1.6 Haploid and diploid, 5.1.7 Meiotic cell division, 5.1.8 Single gene inheritance, 5.1.9 Predicting single gene crosses, 5.1.10 Sex determination, 5.1.11 Multiple gene inheritance, and 5.1.12 Development of our understanding of genetics. Each one has a worked solution and a mark scheme showing where the marks go.