biology key words

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activation energy
energy required to bring about a reaction. (the activation energy is lowered by the precense of enzymes)
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active immunity
resistance to disease resulting from the activities of an individuals own immune system whereby an antigen induces plasma cells to produce antigens
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active site
a group of amino acids that makes up the region of an enzyme into which the substrate fits in order to catalyse a reaction
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active transport
movement of a substance from a region where is it in low concentration to . a region where it is a high concentration. the process requires the expenditure of metabolic energy.
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aerobic
connected with the presence of free oxygen. aerobic respiration requires free oxygen to release energy from glucose.
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allele
one of a number of alternative forms of a gene.
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allergen
a normally harmless substance that causes the immune system to produce an immune response
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allergy
the response of the immune system to an allergen
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antibiotic
a substance produced by living organisms that can destroy or inhibit the growth of micro organisms
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antibiotic resistance
the development in microorganisms of mechanisms that prevent antibiotics from killing them
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antibody
a protein produced by lymphocytes in responce to the presence of the appropriate antigen
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anticodon
a sequence of three adjacent nucleotides on a molecule of transfer RNA that is complementary to a particular codon on a messenger RNA molecule
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antigen
a molecule that triggers an immune system responce by lymphocytes
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antioxident
chemical which reduces or prevents oxidation. often used as an addtive to prolong certain foods
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apoplastic pathway
route through the cell walls and intercellular spaces of plants by which water and dissovlved substances are transported
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Card 2

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resistance to disease resulting from the activities of an individuals own immune system whereby an antigen induces plasma cells to produce antigens

Back

active immunity

Card 3

Front

a group of amino acids that makes up the region of an enzyme into which the substrate fits in order to catalyse a reaction

Back

Preview of the back of card 3

Card 4

Front

movement of a substance from a region where is it in low concentration to . a region where it is a high concentration. the process requires the expenditure of metabolic energy.

Back

Preview of the back of card 4

Card 5

Front

connected with the presence of free oxygen. aerobic respiration requires free oxygen to release energy from glucose.

Back

Preview of the back of card 5
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