The Roles of DNA & RNA in Living Organisms (2.1.2)

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What does the sequence of bases in DNA code for?
The sequence of amino acids in the protein.
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What is a gene?
A length of DNA that codes for one polypeptide.
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What are alleles?
Different versions of the same gene.
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What codes for a specific amino acid?
Each sequence of three bases- a codon.
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Give 2 ways the structure of DNA is related to its function.
The molecules are long, so large amounts of information can be stored. The base-pairing rules mean that complementary strands of information can be replicated.
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Give 2 more ways that the structure of DNA is related to its function.
The double helix structure gives the molecule stability. Hydrogen bonds allow easy unzipping for copying and reading information.
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What is the structure of RNA?
Phosphate, pentose sugar (ribose), and an organic nitrogenous base (A,C, G or U)
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Give 2 differences between DNA and RNA.
DNA is permanent and has T not U. RNA is temporary and has U not T
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Card 2

Front

What is a gene?

Back

A length of DNA that codes for one polypeptide.

Card 3

Front

What are alleles?

Back

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Card 4

Front

What codes for a specific amino acid?

Back

Preview of the front of card 4

Card 5

Front

Give 2 ways the structure of DNA is related to its function.

Back

Preview of the front of card 5
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