Download DNA - stephen fleenor

Warm-Up
The four main types of biomolecules are carbohydrates,
lipids, proteins and…
The four types of nucleotides that make up DNA are
named for their…
The four main types of biomolecules are carbohydrates,
lipids, proteins and…
1.
2.
3.
4.
fatty acids.
starches.
nucleic acids.
amino acids.
The four types of nucleotides that make up DNA are
named for their…
1.
2.
3.
4.
hydrogen bonds
nitrogen-containing bases
phosphate groups
ring-shaped sugars
Yesterday’s Picture
UNIT
6
UNIT
Build a Nucleotide
6
• Make five nucleotides, and glue one into your notebook.
On the front of each nucleotide, write these labels:
A Nucleotide
Label:
• phosphate
• backbone
Label:
• sugar
• ribose
• backbone
Label:
• nitrogenous base
• A,T,G or C
• genetic info
Build a Nucleotide
Then, verbally answer these
questions with your partner:
•
•
•
•
•
•
•
The part of the nucleotide which carries
information is…
The four types of bases are…
The biomolecule ribose resembles is…
I have seen a nucleotide structure
before in…
The purpose of a nucleotide is…
The part of the DNA ladder which has
the bases is…
It is important that DNA is doublestranded because…
UNIT
6
UNIT
DNA
6
A-T
G-C
DNA
• There are 4 nucleotides named after their
nitrogenous bases:
 Adenine (A) always pairs with thymine (T)
aunt = tia
UNIT
6
DNA
• There are 4 nucleotides named after their
nitrogenous bases:
 Adenine (A) always pairs with thymine (T)
aunt = tia
 Guanine (G) always pairs with cytosine (C)
gato = cat
UNIT
6
UNIT
DNA
Hydrogen bonds
• There are 4 nucleotides named after their
nitrogenous bases:
 Adenine (A) always pairs with thymine (T)
aunt = tia
 Guanine (G) always pairs with cytosine (C)
gato = cat
• The bases are held together by weak
hydrogen bonds.
6
UNIT
DNA
Hydrogen bonds
• There are 4 nucleotides named after their
nitrogenous bases:
 Adenine (A) always pairs with thymine (T)
aunt = tia
 Guanine (G) always pairs with cytosine (C)
gato = cat
• The bases are held together by weak
hydrogen bonds.
6
DNA
• There are 4 nucleotides named after their
nitrogenous bases:
 Adenine (A) always pairs with thymine (T)
aunt = tia
 Guanine (G) always pairs with cytosine (C)
gato = cat
• The bases are held together by weak
hydrogen bonds.
• One strand goes in one direction and another
strand goes in another direction.
UNIT
6
UNIT
Build a Nucleotide
6
Glue four nucleotides together as shown below, pairing up the right bases.
Thymine
Adenine
Cytosine
Guanine
Build a Nucleotide
Answer these questions:
• The part of the nucleotide which
contains genetic information is the…
• The part of the DNA ladder which
has the bases is the…
• DNA needs to be double stranded
because…
• How could DNA be used to store
computer files?
• How many bases does a person
have in each of his/her cells?
UNIT
6
Closure
Answer the following question in a
complete sentence:
Name/Nombre
Date/Fecha
Period ____
What are the components that make up DNA?
How is information carried in DNA?
Suggested sentence stem:
DNA is made up of….
The information in DNA is carried by…