Why do you
think they are
studying DNA????
GO to Google Classroom and click on the link
at the top of the page which will take you to
the STEMscopes log-in page
Enter your user name and password
(I will give this to you)
Click on the Engage Student Materials link on
your page.
You will use this
document as you
rotate through the
five stations at the
back of the room,
answering questions
when needed.
•
DNA contains the complete
instructions for a cell/organism.
•
It is a double helix that is shaped like
a long zipper and twisted into a coil
like a spring.
 This unique structure enables DNA
to hold vast amounts of
information, and allows that
information to be copied as
necessary for cell reproduction
and the creation of proteins.
• DNA is made of two chains of
nucleotides (called a double helix)
held together by four nitrogenous bases:
 thymine (T),
 adenine (A),
 cytosine (C) and
 guanine (G).
• These complementary base pairs have a
specific coding pattern
• T always bonds with A, and
• C always bonds with G.
Station 1: The Genetic Book of Life
For this activity, you were ask to
make an analog between DNA and the
“Genetic Book of Life”
Genome: Book
Chromosome: Chapter
DNA strands: Sentences
Genes: Words
Base-pairs: Letters
Station 2: Patterns in DNA
What patterns did you observe in the
molecule?
 twisted shape,
 repeating units of phosphates
and sugars.
 a pattern of nitrogen bases only
pairing with certain ones.
 one side begins with 5’ and ends
with 3’. The other side starts
with 3’ and ends with 5’.
Station 3: Who Am I?
In this activity, you matched the term,
description, and image of the parts of
the DNA molecule.
Term #1: Double helix
Term #2: Gene
Term #3: Hydrogen bond
Term #4: Chromosome
Term#5: Nucleotide
Station 4 Reading Charts
What trends or patterns can you see?
• Adenine and thymine have the same
percentage amount.
• Guanine and cytosine have the same
percentage amount.
Station 4 Reading Charts
Predict the percentages of bases
from the information in this chart.
27
23
27
Station 5 DNA Structure
What are the three components of a
nucleotide?
A phosphate group, a 5-carbon
(pentose) sugar, and one of 4
nitrogenous bases.
What types of bond connect the
nitrogenous bases?
Hydrogen bond
What are the four nitrogenous bases
found in DNA?
Adenine, guanine, cytosine, thymine
Station 5 DNA Structure
What are the three components of a
nucleotide?
 a 5-carbon (pentose) sugar,
 and one of 4 nitrogenous bases.
Station 5 DNA Structure
What types of bond connect the
nitrogenous bases?
Hydrogen
Bonds
Station 5 DNA Structure
What are the four nitrogenous bases
found in DNA?
Station 5 DNA Structure
What molecule does the nitrogenous
base bond to?
Station 5 DNA Structure
Describe any patterns you see
regarding the nitrogenous bases.
Nitrogen bases always pair with a
certain base.
Chargaff’s Rule