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Home Q & A Board Biology-Related Homework Help Biochemistry
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10 years ago
somebody please explain this: All enzymes are biological catalysts but not all biological catalysts are enzymes; i.e., ribozymes (special RNA molecules that catalyze reactions).
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#1
10 years ago
A catalyst is something that speeds up a reaction.  It can be any reaction and doesn't have to be related to metabolic processes.  Enzymes catalyze many reactions, and enzymes, by definition, are proteins.  Ribozymes also speed up certain reactions, but they are composed of RNA, not amino acids.  Clay can also be a catalyst for certain organic and inorganic reactions and it, of course, is inorganic.
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#2
10 years ago
all enzymes are protiens, they are protiens made by living things to work, they perform as catalysts to enduce a chemical reations, there are other catalysts in the world though that are not enzymes, like the metal platinum can be used to accelerated hydrocarbon combustion.  there are other biological catalysts that are not enzymes like ribozymes, they are not protiens but they can still enduce chemical reations,  so a catalyst is just something that can speed up but not used during a chemical reation.
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#3
10 years ago
Enzymes are protein-based molecules that speed up reactions.

Catalysts can be any substance that can speed up reactions.  Heat, for example, is a common catalyst.
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