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Chapter 12 DNA NotesSection 12.2 Structure of DNASection 12.3 DNA ReplicationSection 12.1 Identifying the Substance of Genes
Section 12.2 Structure of DNA
DNA is a molecular structure containing the info that a cell needs to carry out all of its functions. In a
way, __________________________________________________________ .
DNA is a nucleic acid macromolecule made of nucleotides joined into long strands by covalent bonds.
It is located in the ___________________________________________________ cells and the
___________________________________________________ cells.
____________________
4 Bases Compliments Bonds
________________________________________
________________________________________
KeyAdenine (A)Thymine (T)Cytosine (C)Guanine (G)
+
DNA structure is a double helix. The two strands of the double helix run _______________________
(_________________________________).
Scientists involved in solving DNA structure: ____________________________
____________________________
____________________________
Section 12.3 DNA Replication
Before a cell divides, it duplicates its DNA in a copying process titled
_____________________________________ . This process ensures each resulting cell has same
complete set of DNA molecules.
Replication Process – DNA serves as ________________________________________ .
4 Parts to DNA Replication
1. ___________________________________
Section 12.2 Summary-DNA Structure-Scientists Involved
___________________________________
___________________________________
2. ___________________________________
___________________________________
3. ___________________________________
___________________________________
___________________________________
___________________________________
___________________________________
4. ___________________________________________________________________
___________________________________________________________________
__________________________________________
__________________________________________
Replication Fork
___________________________________________________________________________________
Prokaryotic Replication
_____________________________
_____________________________
_____________________________
_____________________________
Eukaryotic Replication
_____________________________
_____________________________
_____________________________
_____________________________
Section 12.1 Identifying the Substance of Genes
Bacterial Transformation – allowed scientists to discover DNA was responsible for carrying traits from
one generation to the next. (Remember, Mendel didn’t know about DNA – just traits)
Bacterial Transformation – one type of bacteria changed permanently into another
Frederick Griffith transformed bacteria and Oswald Avery discovered the DNA in bacteria in the
mice/pneumonia experiments was responsible for genes/traits.
Hershey and Chase experiment showed DNA was in ALL living organisms (they studied viruses).
Section 12.3 Summary-DNA Replication-Replication Fork-Pro Vs. Euk
Role of DNA in HeredityDNA that makes up genes must be ______________________________________________________
__________________________________________________________________________________ .
Just like your iPod! – stores, copies, and plays/transmits music.
Section 12.1 Summary-Bacterial Transformation-Bacteriophage-Role of DNA in heredity Chapter 12 DNA
Section 12.2 Structure of DNASection 12.3 DNA ReplicationSection 12.1 Substance of Genes