Key Terms Unit 1 Chapter 5

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Neucleotide
Monomer of nucleic acid comprising a pentose sugar, nitrogenous sugar and a phosphate sugar
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Semi-conservative replication
Mode of DNA replication in which each strand of a parental double helix acts as a template for the formation of a new molecule, each containing an original, parental stand, and newly synthesised, complementary daughter strand
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Codon
Triplet of bases in mRNA that codes for a particular amino acid, or a punctuation signal
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Genetic Code
The DNA and mRNA base sequences that determine the amino acid sequences in an organism's proteins
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Intron
Non-coding nucleotide sequence in DNA and pre-mRNA, that is removed from pre-mRNA, to produce mature mRNA
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Exon
Nucleotide sequence in DNA and pre-mRNA that remains present in the final mature mRNA, after introns have been removed
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Transcription
A segment of DNA acts as a template to direct the synthesis of a complementary sequence of RNA, with the enzyme RNA polymerase
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Translation
The sequence of codons on mRNA is used to assemble a specific sequence of amino acids into a polypeptide chain, at the ribosomes
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Other cards in this set

Card 2

Front

Mode of DNA replication in which each strand of a parental double helix acts as a template for the formation of a new molecule, each containing an original, parental stand, and newly synthesised, complementary daughter strand

Back

Semi-conservative replication

Card 3

Front

Triplet of bases in mRNA that codes for a particular amino acid, or a punctuation signal

Back

Preview of the back of card 3

Card 4

Front

The DNA and mRNA base sequences that determine the amino acid sequences in an organism's proteins

Back

Preview of the back of card 4

Card 5

Front

Non-coding nucleotide sequence in DNA and pre-mRNA, that is removed from pre-mRNA, to produce mature mRNA

Back

Preview of the back of card 5
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