Point 28 of 28 — Lesson 2: DNA Structure, Replication and DNA Repair EnzymesQuestion bank: 4 questions (4 with pictures)
30Final recap
Griffith (transformation), Avery (DNase control), Hershey–Chase (³²P/³⁵S) and constant DNA content show that DNA is the genetic material (RNA in some viruses). 2. DNA: two antiparallel strands, sugar–phosphate outside, A=T (2 H-bonds), G≡C (3 H-bonds), ten bp per turn. 3. Replication is semi-conservative: helicase → primase → DNA polymerase (leading and lagging strands, Okazaki fragments) → ligase. 4. Repair uses the undamaged strand as template. 5. Prokaryotic DNA is circular; eukaryotic DNA is wrapped around histones in nucleosomes and packed into chromatin and chromosomes. 6. Genome = all DNA of an individual; most eukaryotic DNA is non-coding. 7. Mutations: gene or chromosomal, spontaneous or induced, gamete or somatic.
📝 Question bank for this point
4 questions linked to this point only, 4 of them with pictures.
