B2 - DOUBLE HELIX

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What is a DOUBLE HELIX?
Two DNA strands coiled together
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What are the DNA strands MADE up of?
Four chemical bases
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What are the BASE SUBSTANCES?
Adenine (A), Cytosine (C), Guanine (G), Thymine (T)
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How do these BASES PAIR UP?
A-T, C-G
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How are the BASES JOINED together?
Weak hydrogen bonds
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What is a GENE?
A section of DNA
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What do the BASE sequences CODE for?
A specific protein
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Who discovered the STRUCTURE of DNA?
Rosalind Franklin and Maurice Wilkins, James Watson and Francis Crick
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How did FRANKLIN and WILKINS DISCOVER this?
Directed beams of X-rays onto crystallised DNA and looked at patterns the X-ray formed when they bounced off
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What did WATSON and CRICK do?
Used Franklin and Wilkins ideas, used their knowledge that A & G matched the ammount of T & C, made a model of DNA where all pieces fitted together
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Other cards in this set

Card 2

Front

What are the DNA strands MADE up of?

Back

Four chemical bases

Card 3

Front

What are the BASE SUBSTANCES?

Back

Preview of the front of card 3

Card 4

Front

How do these BASES PAIR UP?

Back

Preview of the front of card 4

Card 5

Front

How are the BASES JOINED together?

Back

Preview of the front of card 5
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