9700 · 6.1
Structure of nucleic acids and replication of DNA — FAQ
Frequently asked questions for 9700 Structure of nucleic acids and replication of DNA. Direct answers first, then deeper explanation — then practise with marking.
What are the key differences between DNA and RNA for Cambridge 9700 Biology?
The main differences are in their sugar components (deoxyribose in DNA, ribose in RNA), one of their nitrogenous bases (thymine in DNA, uracil in RNA), and their typical structure (double-stranded in DNA, single-stranded in RNA). Mastering these distinctions is crucial for Paper 1 multiple choice and Paper 2 structured questions. You can find more details in our free revision lessons and past papers.
How does DNA replication ensure genetic continuity?
DNA replication is semi-conservative, meaning each new DNA molecule formed consists of one original (parental) strand and one newly synthesised strand. This mechanism, coupled with the precise complementary base pairing and proofreading by DNA polymerase, ensures that genetic information is accurately copied and passed on faithfully to daughter cells during cell division, thus maintaining genetic continuity.
Where can I find more Cambridge 9700 Biology revision materials for nucleic acids?
You're in the right place! We offer premium revision lessons like this one, designed specifically for the Cambridge 9700 syllabus. We also provide access to a wealth of past papers and mark schemes to help you practice and perfect your exam technique, alongside a comprehensive free Biology course.