DNA

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DNA is a double helix. each of the 2 strands are made up of lots of small groups called?
Nucleotides
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Each nucleotide contains a small molecule, what is it called?
Base
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What are the 4 bases in DNA?
A, T, C, G
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What keeps the 2 DNA strands tightly wound together?
Each base forms cross links to a base on the other strand.
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Who are the 2 scientists who modeled DNA?
James Watson and Francis Crick.
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What help from other scientists did they use to understand the structure of the molecule?
X-ray showing DNA is a double helix formed from 2 chains wound together. Data showing that bases occurred in pairs.
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Why aren't new discoveries like Watson's and Cricks accepted
Other scientists need to repeat the work first to make sure the results are reliable.
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How does DNA replicate itself?
DNA copies itself every time a cell divides, so each new cell still has the full amount of DNA.The DNA double helix unzips to form 2 single strands to copy itself. New nucleotides join of using complementary base pairing.
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Card 2

Front

Each nucleotide contains a small molecule, what is it called?

Back

Base

Card 3

Front

What are the 4 bases in DNA?

Back

Preview of the front of card 3

Card 4

Front

What keeps the 2 DNA strands tightly wound together?

Back

Preview of the front of card 4

Card 5

Front

Who are the 2 scientists who modeled DNA?

Back

Preview of the front of card 5
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