Why does dna elongate only in the 5 to 3 direction

Assignment Help Biology

Reference no: EM133471645

Questions:

1) Why is it true that nitrogen bases carry the hereditary information (why not the sugars or the phosphates)?

2) What are at least 2 differences in hereditary information between prokaryotic and eukaryotic cells?

3) Why does DNA elongate only in the 5' to 3' direction?

4) Sketch a replication fork showing: parent DNA, RNA primer, leading strand, Okazaki fragment, Lagging strand, origin of replication, DNA polymerase ill, helicase, topoisomerase, and the 5' and 3* end of all DNA polymers.

5) What is the "first line" of defense against mistakes in DNA replication?

6) For mistakes that are not immediately corrected by DNA polymerase Ill, describe the steps in nuclease excision repair to correct mistakes.

7) Why is it necessary for telomerase to extend the end of chromosomes?

Connections:

1) In preparation for what cellular process does DNA replication need to occur?

2) In what phase of the cell cycle does DNA replication occur?

Reference no: EM133471645

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