Thursday, 11 December 2025

DNA replication lesson and study questions

 


 




Study Questions on the DNA Replication video  
If you make 2 column notes or flashcards of these questions, it'll help you remember the steps.

1.  Why does DNA replication happen?  
2.  When sperm and egg meet , they become a _______
3.  Give examples of DNA replication 
4.  Parent cells turn into _______ cells during cell division
5.  How many pieces of DNA are there in human somatic cells?  
5.   Draw a ladder structure of DNA showing the 5' and 3' end
4.  DNA replication is semiconservative.  What does this mean?
5.  How is RNA different from DNA?
6.  What are the nitrogen bases in DNA?  RNA? 
7.  What enzyme synthesizes DNA?  What enzyme synthesizes RNA? 
8.  DNA has only 2 bonds to bind it together.  What are these bonds?

9.  What are the steps for DNA replication?
10.  After helicase unzips the strand, ________ comes and lays down the RNA primer
11.   DNA polymerase III synthesizes the strand in the ____________ direction
12.  What is the difference between the lead strand and lag strand? 
13a.   What enzyme eats the RNA primer?
13b.    After the RNA primer is removed, there is fragmented DNA in the lag strand.  These fragments are known as _________ fragments.
14.  Which polymerase comes along to fill in the gaps with DNA.
15.  In the end there is one more gap left and _________fills in the final gap.
16.  ___________ is the enzyme that relieves the pressure of the supercoiling during DNA replication.