A protein secondary structure - a right-handed spiral held in place by hydrogen bonds between adjacent C=O and NH groups
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Abundance
The frequency of occurrence of plants in a sampled area, such as a quadrat
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Activation Energy
The level of energy required to enable a reaction to take place. Enzymes reduce the amount of energy required to allow a reaction to proceed
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Active Immunity
Immunity that is acquired by activation of immune system
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Active Site
The area on an enzyme molecule to which the substrate binds
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Active Transport
Movement of substances across membranes against their concentration gradient, requiring the use of energy in the form of ATP. Active transport usually involves the use of transport proteins
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Adaptation
A feature of a living organism that increases its chances of survival, for example thick fur on an animal that lives ina cold habitat
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Adenine
A nitrogen-containing organic base found in nucleic acids. It pairs with thymime in DNA and with uracil in RNA
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Other cards in this set
Card 2
Front
The frequency of occurrence of plants in a sampled area, such as a quadrat
Back
Abundance
Card 3
Front
The level of energy required to enable a reaction to take place. Enzymes reduce the amount of energy required to allow a reaction to proceed
Back
Card 4
Front
Immunity that is acquired by activation of immune system
Back
Card 5
Front
The area on an enzyme molecule to which the substrate binds
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