mrlscience.weebly.com · Web viewChapter 12 DNA Notes Section 12.2 Structure of DNA Section 12.3 DNA Replication Section 12.1 Identifying the Substance of Genes Section 12.2 Structure

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