DNA and RNA

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What group does a nucleotide have?
A phosphate group
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What bases does DNA have?
A, T, G and C
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What bases does RNA have?
A, U, G, C
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What sugar does DNA have?
Deoxyribose
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What sugar does RNA have?
Ribose
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How do nucleotides join?
In a condensation reaction
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Wha sort of chain is RNA?
Signle stranded chain of nucleotides
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What chain is DNA?
Two seperate chains held together by hydrogen bonds
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what is this coiled shaped called?
A double helix
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What is the complementary base pairing system
A + T, C + G
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How many hydrogen bonds form between, T + A, C+G?
2 and 3
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What is the genetic code?
The order of bases on one strand of DNA
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What is the code formed from?
The triplet of bases
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What does each triplet code for?
An amino acid
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What will the structure of amino acids form?
A polypeptide
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What does TRNA do?
brings amino acid to MRNA molecule for translation
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What is the conservative model?
The DNA molecule would get copied and make a new molecule
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What is dispersive model?
DNA cuts off at various parts and then swaps to make two new molecules
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What is the semi conservative model?
The DNA splits which forms the base for two new DNA molecules
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What is the first step in DNA replication?
Hydrogen bonds between bases break allowing the DNA to unzip
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What do the DNA nucleotides then do?
Pair up with their complementary bases
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What links the adjacent nucleotides?
DNA polymerase
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What are created as a result?
Two identical daughter strands
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What is the first step in transcription?
DNA unwinds and hydrogen bonds between base pairs split and seperate the two strands
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What strand is used in the formation of mRNA?
Antisense strand
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What are the ribonucleotides tied up with?
Their complementary base pair on the template strand, U and A
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What are Ribonucleotides joined up by?
RNA polymerase
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to form what?
A strand of mRNA
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During translation, What does the mRNA do?
Carry the genetic information in the sam base sequence language as DNA
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What does tRNA do?
translate the base sequence on the mRNA into the protein amino acid sequence
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What does each tRNA carry?
An amino acid to the mRNA where the amino acid carried by the other tRNA to build a polypeptide
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Other cards in this set

Card 2

Front

What bases does DNA have?

Back

A, T, G and C

Card 3

Front

What bases does RNA have?

Back

Preview of the front of card 3

Card 4

Front

What sugar does DNA have?

Back

Preview of the front of card 4

Card 5

Front

What sugar does RNA have?

Back

Preview of the front of card 5
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