• I can identify the location of DNA in a cell.
• I can describe the structure of DNA.
• I can identify the basic building block of DNA.
• I can list the 3 parts of a nucleotide.
• I can name the type of sugar found in DNA.
• I can list the possible bases found in DNA.
• I can identify which nitrogenous bases pair with
which other bases.
• I can describe the process in which DNA
replicates itself.
• Cell
• Nucleus
• DNA
• Sugar
• Phosphate
• Nitrogenous Base
• Nucleotide
• Adenine
• Thymine
• Cytosine
• Guanine
• Replication

If you were to stretch all your strands of
DNA out, end to end, how long would it
be?
Remember… In the cell there is
the nucleus. This is the control
center of the cell because it holds
the organism’s DNA.


DNA looks like a
ladder that is
twisted
This structure is
called the
“double helix”

DNA is made up of 3
very specific parts:
› S = sugar
› P = phosphate
› N = nitrogenous base
1 Nucleotide = 1 Phosphate + 1 Sugar +1 Nitrogenous base
Stacking millions of nucleotides one on top of the other
allows for the twisted ladder shape of DNA.
1 Nucleotide = 1 Phosphate + 1 Sugar +1 Nitrogenous base
Notice that the name of the sugar in DNA is deoxyribose.
1 Nucleotide = 1 Phosphate + 1 Sugar +1 Nitrogenous base
There are 4 different options for the base.
Thymine
Adenine
Cytosine
Guanine
Thymine & Adenine always
pair up.
Cytosine & Guanine always
pair up.

DNA has to replicate (make a copy of itself)
before the cell can divide and become 2 cells.
Step 1: The 2 strands of DNA separate
Step 2: A new strand of DNA is created base-bybase to complement each original strand
The replication continues until the formation of 2
new, complete DNA strands is complete
What is the structure of DNA called?
 What is the sugar in DNA called?
 What base pairs with Adenine?
 What base pairs with Cytosine?

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https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwi7itO4h8PKAhUF
bSYKHX0QB-oQjB0IBg&url=http%3A%2F%2Fwww.mamagonegeek.com%2Fextract-dna-from-a-kiwi%2F&psig=AFQjCNE4uISBI7LcnmvY7GYHAATJJsPDQ&ust=1453745118379667
https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjgt3sicPKAhXC5iYKHQVgAZQQjB0IBg&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FDNA&psig=AFQjCNE4uISBI7LcnmvY7GYHAATJJsPDQ&ust=1453745118379667
http://fbcmcreationstudy.blogspot.com/2012/07/dna-101-deciphering-biological.html
http://3.bp.blogspot.com/-sw4gzGUh9zU/T0MFd033mOI/AAAAAAAAACs/5_cr7Ov4alo/s1600/DNA+Ladder.png
http://media1.shmoop.com/images/biology/biobook_biomol_26.png
https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwipxaGHlMPKAh
VIKiYKHQ9QBywQjB0IBg&url=https%3A%2F%2Fwww.chem.wisc.edu%2Fdeptfiles%2Fgenchem%2Fnetorial%2Fmodules%2Fbio
molecules_chime%2Fdna1%2Fdna12.htm&psig=AFQjCNEzdjU1N741spdo6FCb0EUc96lVXA&ust=1453748954693207
https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwifiLXLlcPKAhWF
QyYKHeLBDHwQjB0IBg&url=http%3A%2F%2Fusers.rcn.com%2Fjkimball.ma.ultranet%2FBiologyPages%2FB%2FBasePairing.html
&psig=AFQjCNGhB3mnsCZB
VKwOi9K3QeB4JOOYeg&ust=1453749640489910
http://study.com/cimages/multimages/16/DNA_simple2.svg.png
http://jonlieffmd.com/wp-content/uploads/2012/05/512px-DNA_replication_split_horizontal1.png
https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjS_ICnpsPKAhW
CSSYKHffJANMQjB0IBg&url=http%3A%2F%2Fwww.genetic-inference.co.uk%2Fblog%2F2009%2F04%2Fbasics-sequencingdna-part-1%2F&bvm=bv.112454388,d.eWE&psig=AFQjCNHsaoCmb4MXSoQCb_FL8drjSl35YQ&ust=1453753870471956