DO NOW1. Look at the picture below and answer the following

questions.

2. What do you think this picture is representing?

3. Write out all observable traits of this picture. (IE: The lines connecting the two sides are different colors, etc).

ANNOUNCEMENTS

Test retakes are due today!

http://now.msn.com/now-plus/0221-lebron-dunk-kid-vid.aspx

DNA IS THE INFORMATION MOLECULE

DNA is a molecule that stores informationCarries all the information that a cell needs

to function, grow, and divide HOWEVER, PROTEINS do the work.

PROTEINS AND AMINO ACIDS

Proteins are large molecules that are made up of chains of amino acids.

Amino Acids: proteins connected together.

WHAT DO WE USE PROTEINS FOR?

1. Building cell parts2. Repairing damage to the body3. Fighting disease4. Regulating the speed of chemical

reactions in the body (enzymes).

HOW DOES THIS RELATE TO DNA? DNA stores the information that cells

need to make sure they put together the amino acids in the right order. The order must be correct in order to make proteins.

NUCLEOTIDE BASES Nucleotide bases form the rungs of

the ladder. Four nucleotides: adenine (A),

thymine (T), cytosine (C) and guanine (G).

WAY TO REMEMBER ADENINE, THYMINE,

CYTOSINE, AND GUANINE

AllTigersCanGrowl

FAST FACTS What we’re going to be doing:

There is chart paper around the room.Each person will grab a marker from me and

then find a place on the wall. Once we are on the wall, I’ll be explaining

exactly what we are going to be doing.

REPLICATION During replication DNA strands are as

templates used to make copies of new strands. Here is how it happens:

1. The DNA molecule opens up, separating into two strands.

2. Nucleotides match up and join to the open DNA strands.

3. Two identical DNA molecules are formed.

GUIDED PRACTICE:P1 Turn to Page C137 and C138. Draw the diagram labeled replication at

the bottom of the page. Make sure you label it.

You have 10 minutes. Hint: replication means to “repeat”

GUIDED PRACTICE With a partner, answer the following

question

Describe the differences among DNA, genes and Chromosomes.

How are they related?

Once you are done:Turn to page C137 and C138 and copy the

pictures and label them in your notes. (25 pts)

ANSWERS: Genes are units of heredity that are

located in DNA. DNA-molecules that stores information

(about your genetic make up) Chromosomes- this is the form that DNA

takes when cells divide. (DNA coils up into chromosomes)

INDEPENDENT PRACTICE1. Describe the shape of the DNA

molecule and how the nucleotide bases fit into that structure.

2. What is a protein and what is it made of?

ON THAT PAPER… Let’s decode our names! For each letter of the alphabet,

geneticists have assigned a specific codon (group of three nucleotides.

We are going to be using the list below and write our the codon for our names.

Our Alphabet    Amino Acid Name    Simplified Codon

A   Alanine   GCT

B       GCA (Alanine)

C   Cysteine   TGC

D   Aspartic acid   GAT

E   Glutamic acid   GAG

F   Phenylalanine   TTT

G   Glycine   GGG

H   Histidine   CAT

I   Isoleucine   ATA

J       ATC (Isoleucine)

K   Lysine   AAG

L   Leucine   CTC

M   Methionine   ATG

N   Asparagine   GAC

O       GAT (Asparagine)

P   Proline   CCC

Q   Glutamine   GAG

R   Arginine   CGT

S   Serine   TCA

T   Threonine   ACT

U       ACG (Threonine)

V   Valine   GTC

W   Tryptophan   TGG

X       GTA (Valine)

Y   Tyrosine   TAC

Z       TAT (Tyrosine)

EXIT TICKET Adenine matches with __________________.

A. Thymine B. Cytosine C. Guanine D. Uracine

Cytonine matches with _________________. A. Thymine B. Adenine C. Guanine D. Uracine

What’s the job of DNA?