DNA Structure Power Point

8/3/2019 DNA Structure Power Point

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By Joshua Rosenberg

DNA Structure


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IntroductionThe four Molecules that are very important

to life

1.Lipids

2.Proteins3.Carbohydrates

4.Nucleic acidsDNA is composed of Nucleic Acids


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IntroductionIn DNA, the Nucleic Acids are found in the

form of a molecule called a Nucleotide

Tell me more,please!


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CompositionRemember that the Nucleotide is the basic

building block (Monomer) of DNA


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StructureSo, a molecule of DNA is

made up of millions ofsubunits called

NucleotidesThose subunits are the

genetic code!The structure of DNA is

of 2 strands arrangedinto a Double Helix


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StructureEach nucleotide consists ofthree parts:

1.P

2.D3.A, T, C, G


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StructureEach nucleotide consists ofthree parts:

1.Phosphate group

2.Deoxyribose sugar3.Nitrogenous base


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The three parts of aNucleotide

Phosphate

Sugar

NitrogenousBase


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StructureAnd the structure of DNA

is of 2 strands arranged

into a Double Helix

T B t


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T e Bac one an t eBasesThe phosphate and deoxyribose sugar (P &

D) form the backbone of the DNA molecule

The nitrogen bases (A, T, C, G) form the

rungs of the ladder


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NucleotidesThere are four distinct types of Nucleotides

Adenine (A)

Thymine (T)Cytosine (C)

Guanine (G)


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Nucleotides

A

Adenine

T

Thymine

G

Guanine

C

Cytosine


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NucleotidesEach base will only bond with one

other specific base.

Adenine (A)

Thymine (T)

Cytosine (C)

Guanine (G)

Form a basepair.

Form a basepair.


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DNA StructureBecause of this complementary base

pairing, the order of the bases in onestrand determines the order of the

bases in the other strand


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G

G

A

T

T

A

A

C

T

G

C

A

T

C


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DNA StructureTo crack the genetic code found in

DNA we need to look at the sequenceof bases.

The bases are arranged in tripletscalled codons.

A G G - C T C - A A G - T C C - T A G

T C C - G A G - T T C - A G G - A T C


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What do I need to know?DNA is the hereditary material

DNA contains the instructions for all living

organismsA DNA molecule is composed of many tiny

Nucleic Acids called Nucleotides


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What do I need to know?The Nucleotide has three parts

Phosphate (P)

Deoxyribose Sugar (D)Nitrogenous Base (A, T, C, G)

The bases are complimentary and pair-up

A-T

C-G


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Looking AheadEach tripletof nitrogenous bases is known

as one codon

Each codon encodes one amino acid


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Looking AheadDNA to RNA is called transcription

RNA to Protein is called translation


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DNA Structure Power Point