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enzymes 5

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QuestionAnswer
Enzymes work by decreasing the amount of energy needed to activate the chemical reaction.
Because of this, enzymes are a type of? catalyst.
Many of the chemical reactions that occur in cells are? catalyzed by enzymes.
without enzymes catalyzing metabolic reactions? cells would not be able to perform metabolism quickly enough to support life.
Most enzymes are? proteins.
Like other proteins, enzymes are produced by? a cell’s ribosomes.
Ribosomes produce specific enzymes? to act on specific substances,
specific substances, are called? substrates.
For example, the enzyme catalase assists in the breakdown of? hydrogen peroxide into water and oxygen.
Enzymes are also important for the synthesis of? new molecules.
RNA polymerase is an? enzyme that is essential to the process of transcription.
Molecules of mRNA are transcribed by? RNA polymerases and later new protein molecules are synthesized based on the instructions coded in the mRNA.
The shape of an enzyme determines? how it works.
Most enzymes have a surface with? one or more deep folds.
The folds make pockets, which are called? active sites.
The active sites match folds? in the substrate’s surface
a particular enzyme fits against? its substrate like two adjacent puzzle pieces.
An enzyme’s shape is? key to how the enzyme functions.
If its shape is changed? the enzyme may not function as well or at all.
Changes in temperature and pH can? affect the shape of an enzyme’s active sites.
enzymes are only able to work properly? in a certain temperature and pH range.
RNA polymerase is? an enzyme that is essential to the process of transcription.
Molecules of mRNA are transcribed by? RNA polymerases and later new protein molecules
synthesized based on the? instructions coded in the mRNA.
Created by: t-raw15
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