7.1 DNA structure and replication

  1. Which letter (A–D) indicates where a new nucleotide would attach?
 





2. Which structure found in eukaryotes has a single membrane?





3. The diagram shows how pre-mRNA is processed into mature mRNA. Which structures are indicated by the letters W and X?    





4. Which is a valid comparison between prokaryotic and eukaryotic DNA?





5. How does DNA replicate?  





6. What is a nucleosome?





7. After which process are introns removed?





8. What does a nucleosome consist of ?





9. What are Okazaki fragments?





10. What is the reason for Okazaki fragments being formed during DNA replication?





11. Which of the following forms the nucleosome?  





12. What happens during the formation of Okazaki fragments?





13. The diagram below shows part of a DNA molecule that is being replicated. Where would DNA polymerase link the next nucleotide during replication?





14. What are the fundamental packaging units of eukaryotic chromosomes?





15. Which of the following chemicals is a component of eukaryotic chromosomes?







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