Match each description with its correct term: ions or small molecules that are n
ID: 3519539 • Letter: M
Question
Match each description with its correct term:
ions or small molecules that are needed for activity of a specific enzyme
[ Choose ] lock and key model induced fit model turnover number a metabolic pathway allosteric inhibition mass action cofactors or coenzymes an optimal pH
a condition at which an enzyme exhibits peak activity
[ Choose ] lock and key model induced fit model turnover number a metabolic pathway allosteric inhibition mass action cofactors or coenzymes an optimal pH
a sequence of enzymatic reactions
[ Choose ] lock and key model induced fit model turnover number a metabolic pathway allosteric inhibition mass action cofactors or coenzymes an optimal pH
a final product of a metabolic pathway binding to an intermediate enzyme outside of its active site
[ Choose ] lock and key model induced fit model turnover number a metabolic pathway allosteric inhibition mass action cofactors or coenzymes an optimal pH
a reaction driven from high (substrate) to low (product) concentration
[ Choose ] lock and key model induced fit model turnover number a metabolic pathway allosteric inhibition mass action cofactors or coenzymes an optimal pH
Explanation / Answer
1. Ions or small molecules that are needed for activity of a specific enzyme
Ans: cofactors or coenzymes
Cofactors are mostly metal ions tat assist enzymes during the catalysis of reactions.
Coenzymes are non-protein organic molecules,mostly derivatives of vitamins , they bind apoenzyme to proteins to form holoenzyme.
2. a condition at which an enzyme exhibits peak activity
Ans: an optimal pH
An enzyme shows maximum activity over the specific pH range in which a molecule exists in its properly charged form and is called the optimum pH of the enzyme. Example: Most body fluids have pH values between 6 and 8.
3. a sequence of enzymatic reactions
Ans: a metabolic pathway
A metabolic pathway is series of chemical reactions occurring within a cell. The reactants, products, and intermediates of an enzymatic reaction are known as metabolites and catalyzed by enzymes.
4. a final product of a metabolic pathway binding to an intermediate enzyme outside of its active site
Ans: allosteric inhibition
Allosteric inhibition / Negative allosteric modulation occur when binding of one ligand decreases the affinity for substrate at other sites. Ex: when 2,3-BPG binds to an allosteric site on Hb (Hemoglobin) leads to decreased affinity of all subunits for oxygen.
5. a reaction driven from high (substrate) to low (product) concentration
Ans: mass action
Law of mass action is rate of a chemical reaction, directly proportional to the product of the activities or concentrations of the reactants. Which is important for behaviors of solutions in dynamic equilibrium.