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Study Guide and Concept checks (ch:8 BIO)
Terms in this set (30)
Fits into an enzyme's active site,
What is being created or finished after a chemical reaction
What is being consumed or broken off during a chemical reaction
Is the area inside an enzyme (a part of the enzyme) where the substrate fits into.
Adding something to an enzyme to make it work
Speed up a reaction and lowers the activation energy, they do not change or used up in a reaction
What is the term catalyst? What are its properties?
(an activator; turn on enzymes), Non protein part of an enzyme that helps catalyze the reaction. Attach to an enzyme.
What are cofactors? What is its role?
(an activator; turn on enzymes) Organic cofactors ( contain carbon). Helping the enzyme to work/function. Are non-protein molecules that attach to an enzyme (ex: thiamine)
What are Coenzymes? What is its role?
PH, temperature, concentrations, inhibitors, and activators
What things can affect an enzyme's ability to function?
Where a chemical is blocking the active site or changes the shape (takes over the enzyme's active site; leaving the actual substrate to not be able to enter). Bonds into the active site stopping any reaction.
What is a competitive inhibitor? How does it work?
(allosteric reaction works the same way), changing the shape that bonds to the allosteric site (other site apart from the active site). Does not bond to active site
What is an non-competitive inhibitor? How do they work?
Each enzyme can only fit a specific substrate, just like a puzzle piece
Why do enzymes only act on specific substrates?
A chemical that fits into its own allosteric sites for each subunit (has two or more subunits or polypeptides; not one like normal enzymes) It has two forms active and inactive that it can switch to causing shape change.
How are allosterically regulated enzymes different from normal enzymes?
(stabilizes noncompetitive/inactive states) Inhibitor bonds to an allosteric site, that changes the shape of the active site and will not let a substrate bind (regulates the frequency and on/off action); the binding of this stabilizes the inactive form of the enzyme.
How do allosteric inhibitors work?
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