Biology #flipclass for 01-22-14 DNA Replication2 #bioHWHL

VIdeo introduction to the replication of DNA. In later lectures we'll explore its function.

DNA ReplicationFocus Questions
1. What does the ‘ symbol mean? [How is it said?] (1pt)
2. Which end of the pentose sugar is the 3’ end? (1pt)
3. Which end of the of the sugar is the 5’ end? (1pt)
4. Describe the two sides of DNA in terms of 3’ and 5.’ (1pt)
5. Why does DNA replication need to take place? (1pt)
6. In order for DNA to be replicated, it needs to be “unzipped.” Which enzyme performs this process? What bond does it need to break? In which direction does it travel? (3pts)
7. What is DNA polymerase? What is its job? In which direction does it travel? (3pts)
8. What happens if the new DNA is not proofread properly? (1pt)
9. With reference to DNA replication, what does it mean that the process is semi-conservative?
10. What happens to the ends of a chromosome EVERY time DNA is replicated?
11. Why can somatic cells only divide so many times?