B1.2 - Key Words
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11 Terms
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Active site
Region of enzyme where substrate binds
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Chromosome
Strand of DNA containing genes
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Denature
Shape of an enzyme is changed so that it can no longer catalyse a reaction
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DNA
Biological polymer made from nucleotide monomers. The sequence contains all the information needed to make an organism
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DNA base
Nitrogenous base found in DNA - adenine, thymine, cytosine or guanine
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Enzyme
Biological catalyst - this means it speeds up reactions without being used up
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Gene
Section of DNA which codes for a characteristic
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Lock and key hypothesis
Model that explains the specificity of enzymes
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Nucleotides
Monomer (unit) found in DNA, consisting of an organic base, ribose sugar and a phosphate group
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Polymer
Substance made up of many monomers (similar subunits) bonded together
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Substrate
Molecules that an enzyme acts upon
Note 
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