No bell ringer again. Today we began class with a review on DNA and replication.
What does DNA stand for? Deoxyribonucleic acid
Where is DNA found in a cell? Nucleus
What does DNA do? contains instruction for building proteins
*Only 2% of our DNA contains protein coding genes. Scientists are currently working to find out what the other 98% is for-it used to be called "junk DNA".
* We have about 23,000 protein coding genes.
What is the monomer of DNA? nucleotides
Name the three parts of a nucleotide: sugar, phosphate group, and nitrogen containing base
Name the 4 bases found in DNA: adenine, guanine, cytosine, thymine
How do they pair up? Adenine + Thymine and cytosine + guanine
Which bases are the 2 ringed purines? adenine and guanine
Which bases are the 1 ringed pyrimidines? cytosine and thymine
What is the process called when DNA is copied? replication
What is the enzyme that "unzips" the DNA? helicase
What is the enzyme that joins the nucleotides? DNA polymerase
We then modeled replication using this internet interactive: http://www.pbs.org/wgbh/aso/tryit/dna/shockwave.html
Next we finished the chapter 10 notes-see previous post for worksheet and powerpoint link.
Last of all we worked on this worksheet that compares DNA and RNA.
If we had time we started watching Nova "Cracking the Code of Life"
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