DNA, Chromosomes, Cell Cycle wrap up

We started Friday with the following daily question and discussion.  After that we took our first daily question quiz of this nine weeks!

Friday January 25^th

DNA replication is said to be semi-conservative.  How are the two DNA molecules related to each other?  They are IDENTICAL sequences but each has one Old strand (or template strand) and one NEW strand.  Recall how we saw this with our Kinex models below.

The enzyme DNA polymerase has two very important functions.  First is they are responsible for adding new Nucleotide bases (accoridng to the base pairing rules) to each side.

The second is that it acts like a “ Proof reader"

What do you think would happen if DNA polymerase didn’t do it’s “Job”  The DNA may have a mistake in it.  ANY mistake in DNA (whether is changes the function of the cell or not) is known as a mutation.