97
DNA Structure Notes
11/19/14
Starter:
What do you think
DNA is?
DNA Structure Notes
11/19/14
Application/Connection:
Building a DNA molecule
Exit:
Practice: Notes
98
Draw or write one
thing you learned
today from the
notes.
November
19, 2014
AGENDA
B.6 A.
Students will Identify
and describe
components of DNA
while reading and
writing on notes and
starting an activity.
1 Starter
2. Notes
3. DNA Molecule
4. Exit
Date
Table of Contents
Lecture/ Activity/ Lab
Page
10/15 Cell Transport and Homeostasis Term Notes 65-66
10/16 Osmosis in Cells Lab
67-68
10/18
Observing Osmosis in Elodea
69-70
10/21
Cell Analogies Poster
71-72
10/24
Cell Transport Cards
73-74
10/25
Experimental Design
75-76
10/28-29 Photosynthesis Notes
77-78
10/31
Cellular Respiration and Photosynthesis
79-80
11/1
Cellular Respiration Notes
81-82
11/6
Cellular Respiration Lab
83-84
11/7
Photosythesis/Cellular Respiration
85-86
11/13
DNA notes
87-88
Table of Contents
Date
Lecture/ Activity/ Lab
10/14 Eukaryotic and Prokaryotic Poster
10/15 Osmosis Lab
10/16
Osmosis Lab Day II
10/17 Osmosis Lab Day III and Quiz
10/20
Cell Analogies Poster
10/21
Experimental Design
10/22
Test Review
10/27-28 Photosynthesis Notes
10/29
Photosynthesis Ws
11/3
Cellular Respiration Notes
11/4 Photosynthesis in Elodea
11/5
Cellular Respiration in Yeast Lab
11/6
Exercise Lab
11/7
Photosynthesis Writing 2
11/10
Photosyntheis/Cellular Respiration Poster
11/19
DNA notes
Page
67-68
69-70
71-72
73-74
75-76
77-78
79-80
81-82
83-84
85-86
87-88
89-90
91-92
93-94
95-96
97-98
7018426
DEOXYRIBONUCLEIC
ACID
 STORES AND PASSES ON
GENETIC INFORMATION
FROM ONE GENERATION TO
THE NEXT.
DISCOVERERS
 a. James Watson-American biologist
 b. Francis Crick- British physicist
 c. Maurice Wilkins- British scientist
 d. Rosalind Franklin- British scientist (only
woman, died before the noble prize was
given)
DNA Structure
 DNA consists of two molecules that are arranged
into a ladder-like structure called a Double
Helix.
 A molecule of DNA is made up of millions of
tiny subunits called Nucleotides.
 Each nucleotide consists of:
1. Phosphate group
2. Pentose sugar
3. Nitrogenous base
Nucleotides
Phosphate
Nitrogenous
Base
Pentose
Sugar
Nucleotides
 The phosphate and sugar form the backbone
of the DNA molecule, whereas the bases form
the “rungs”.
 There are four types of nitrogenous bases.
DNA Structure
 Because of this complementary base pairing,
the order of the bases in one strand
determines the order of the bases in the other
strand.
Nucleotides
 Each base will only bond with one other
specific base.
 Adenine (A)
 Thymine (T)
 Cytosine (C)
 Guanine (G)
Form a base pair.
Purines
Form a base pair.
Pyrimidines
Nucleotides
A
Adenine
C
Cytosine
T
Thymine
G
Guanine
A
C
T
C
T
G
A
G
A
T
G
C
T
A
DNA Structure
 To crack the genetic code found in DNA we
need to look at the sequence of bases.
 The bases are arranged in triplets called
codons.
AGG-CTC-AAG-TCC-TAG
TCC-GAG-TTC-AGG-ATC
DNA Structure
 A gene is a section of DNA that codes for a
protein.
 Each unique gene has a unique sequence of
bases.
 This unique sequence of bases will code for the
production of a unique protein.
 It is these proteins and combination of proteins
that give us a unique phenotype.
DNA Replication
 Is the process by which a DNA molecule is
duplicated into identical DNA molecules.
 It occurs in the nucleus of the cell

STEPS IN REPLICATION
 During replication, the DNA ladder separates, or
unzips
 Free nitrogen bases “float” in the nucleus pair up
with the nitrogen bases on each half of the DNA
 Two new DNA molecules are formed
DNA
Gene
Protein
Trait
SUMMARY QUESTION
Draw one thing you learned today from the
notes.
97
DNA Structure Notes
11/19/14
Starter:
What do you think
DNA is?
DNA Structure Notes
11/19/14
Application/Connection:
Building a DNA molecule
Exit:
Practice: Notes
98
Draw or write one
thing you learned
today from the
notes.