[问答题]
The diagram below shows the structure of D
+b,o75e dahs99q rksnNA nucleotid
x(erg;,d5,a3u 8ro yekk voth3 7)sches.
1.State the component of DNA that is attached at position X.
2.Identify the type of bonding shown as dotted lines in the diagram.
3.The 5’ and 3’ linkages in DNA play an important role in replication, transcription and translation.
3.1.On the diagram, label the 5’ prime and 3’ prime ends on both strands to show the direction of the DNA.
3.2.Outline how the processes of transcription and translation occur with regards to the formation of 5’ and 3’ linkages.
4.Explain how the DNA helix maintains its stability.
5.Erwin Chargaff’s data on the relative amounts of purine and pyrimidine bases played an important role in determining the structure of DNA.
5.1.Outline how Chargaff’s data contributed to our understanding of the structure of DNA.
5.2.State a proposed model of DNA that was falsified by Chargaff's data.
