DNA: THE ALAPHABET OF LIFE - PowerPoint PPT Presentation

Title: DNA: THE ALAPHABET OF LIFE


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DNA THE ALAPHABET OF LIFE
CREATED BY CHRIS WOODS
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DNA
DEOXYRIBONUCLEIC ACID
STORES AND PASSES ON GENETIC INFORMATION FROM ONE
GENERATION TO ANOTHER .
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DNA STRUCTURE
THE DNA STRUCTURE IS SHAPED LIKED A SPIRAL
STAIRCASE, OR TWISTED LADDER.
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DNA STRUCTURE
THE OUTER PARTS OF THE OF THE LADDER ARE MADE OF
SUGARS.
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DNA STRUCTURE
THE STEPS OF THE LADDER ARE MADE OF PAIRS OF
NITROGEN BASES.
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DNA STRUCTURE

• ADENINE A
• GUANINE G
• CYTOSINE C
• THYMINE T
• THEY ARE REPRESENTED BY
• THEIR CAPITAL LETTER.

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DNA STRUCTURE
THERE IS ONLY ONE WAY THE NITROGEN BASES CAN FORM
ADENINE PAIRS WITH THYMINE GUANINE PAIRS WITH
CYTOSINE
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DNA STRUCTURE
QUESTION ?
CAN C JOIN WITH A
AND G JOIN WITH T
YES
NO
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CORRECT MOVE ON
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SORRY REVIEW MORE
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DNA STRUCTURE
ACTCATGGTCATG
TGAGTACCAGTAC
THIS IS AN EXAMPLE OF A GENETIC CODE THAT MAY BE
FOUND IN YOUR BODY.
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DNA STRUCTURE
THE COMBINATIONS OF THE NITROGEN BASES IS THE
CODE THAT PRODUCES THE GENES FOR A PARTICULAR
TRAIT.
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DNA STRUCTURE
BECAUSE THERE CAN BE SO MANY DIFFERENT
COMBINATIONIS OF THE BASES THE CODE CAN BE
LIMITLESS
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DNA STRUCTURE
EXAMPLE ATCGTCAGG MAY BE FOR HAIR
COLOR. BUT ATCGTCAGC MAY BE FOR EYE COLOR
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DNA REPLICATION
REPLICATION IS THE PROCESS WHERE DNA MOLECULES
FORM EXACT DUPLICATS.
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DNA REPLICATION

• THE LADDER SPLITS

2. FREE FLOATING NITROGEN BASES BEGIN TO PAIR
WITH EACH STRAND
3. TWO NEW DNA CHAINS ARE FORMED