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12 Cards in this Set
- Front
- Back
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What is a codon? |
a sequence of three adjacent nucleotides in mRNA that codes for one amino acid |
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What is a anti-codon? |
a sequence of three adjacent nucleotides on a mole of transfer RNA that is complementary to a particular codon on a messenger RNA molecule |
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Depolarisation |
Temporary reversal of charges on the cell-surface membrane of neurones that takes place when a nerve impluse is transmitted |
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Gel electrophoresis |
a technique used to seperate DNA fragments of different lengths by placing them on agar gel and passing a voltage across them |
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Gene marker |
A section of DNA that is used to indicate the location of a gene |
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Insulin |
A hormone released by the islets of langerhans in the pancreas, which decreases blood glucose levels by increasing the rate of conversion of glucose to glycogen |
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Introns |
Sections of DNA that do not code for a polypeptide, the introns are removed from pre-mRNA after transcription |
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Motor neurone |
Neurone that transmits action potentials from the central nervous system to an effector |
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Refractory Period |
Period during which the membrane of the axon of a neurone cannot be depolarised and no new action potential can be initiated. |
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Repolarisation |
Return to the resting potential in the axon of a neurone |
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Transcription |
Formation of mRNA molecules from the DNA that makes up a particular gene |
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Palindromic Recognition site |
Each sequence of DNA nucleotides can be read the same in opposite directions |
