Flashcards
Enzymes
Cards in this deck (9)
- 1EnzymesProteins which act as catalysts and increases the rate of reactions without being used up in the reaction.
(also a few RNA molecules which act as catalysts- sometimes called ribozymes) - 2Active SiteA specific region of the tertiary protein structure which binds the reactant molecules.
The reactant in an enzyme catalysed reaction is called the substrate. - 3Prosthetic GroupsThey add different chemical structures which amino acids cant provide.
Permanently attached to the protein.
The enzyme without its prosthetic group is called the apoenzyme.
Apoenzyme + Prosthetic group = Holoenzymes - 4PorphyrinA group of organic compounds.
Involved in many reactions. - 5CofactorsMany enzymes need to bind other organic molecules in order for the reaction to be catalysed.
Cofactors may be metal ions.
Organic cofactors are called coenzymes. - 6Nicotine Adenine Dinucleotide (NAD)Coenzyme found in all living cells.
Consists of two nucleotides joined through their phosphate groups, with one nucleotide containing an adenine base and the other containing nicotinamide.
NAD+ is involved in redox reactions, carrying electrons from one reaction to another. - 7Lactate Dehydrogenase (LDH)LDH inconverts pyruvate and lactate with simultaneous interconversion of NADH and NAD+.
- 8Lock and Key Model
- 9Induced Fit Model
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- CBBM Flashcards on Enzymes, created by izzy-whizzy on 30/04/2013.
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