The Structure of the DNA Molecule

The finger print that is inside your body!

DNA stands for:D: DeoxyriboseN: NucleicA: Acid

DNA is too small to see, but under a microscope it looks like a twisted up ladder!

Every living thing has

DNA.

That means that you have

something in common with a zebra, a tree, a

mushroom and a beetle!!!!

DNA is made up of steps and rails of a ladder.

This is a rail

This is a step

Green can only go with Red

Purple can only go with Yellow

Deciphering DNA's structure.

1. DNA is made up of subunits which scientists called nucleotides.

2. Each nucleotide is made up of a sugar, a phosphate and a base.

3. There are 4 different bases in a DNA molecule:

a. adenine (a purine) b. cytosine (a pyrimidine) c. guanine (a purine) d. thymine (a pyrimidine)

Nucleotides

1. DNA is made up of subunits which scientists called nucleotides.

A nucleotide is a chemical compound that consists of 3 portions: a nitrogenous base, a sugar, and one or more phosphate groups.

2. Each nucleotide is made up of a sugar, a phosphate and a base.

3. There are 4 different bases in a DNA molecule:

a. adenine (a purine)

b. cytosine (a pyrimidine)

c. guanine (a purine)

d. thymine (a pyrimidine)

DNA Molecule

• The Impossibility of Information

The DNA molecule is one of the greatest scientific discoveries of all time. First described by James Watson and Francis Crick in 1953, DNA is the famous storehouse of genetics that establishes each organism's physical characteristics.

DNA is like a fingerprint because everyone’s is a little

different!

How would the police look at DNA to figure out who committed a crime?

You can tell people apart by their fingerprints………

and their DNA!

Within cells, DNA is organized into structures called chromosomes.

DNA Molecule

These chromosomes are duplicated before cells divide, in a process called DNA replication.