Enzymes use several types of catalytic mechanisms. Differentiate between acid-ba
ID: 33259 • Letter: E
Question
Enzymes use several types of catalytic mechanisms. Differentiate between acid-base catalysis, covalent catalysis, and metal ion catalysis. (If you answer any part of this question incorrectly, a single red X will appear indicating that one or more of the phrases are sorted incorrectly.) (Place the correct definitions in the correct categories (there are 4 categories), acid-base, covalent, metal or all):
catalysts may participate in oxidation-reduction reactions by changes in the oxidation state
a Zn2+ cofactor may properly orient the substrate in the active site through ionic interactions
may take part in interactions involving Fe2+
lowers the energy or stabilizes the transition state or intermediate
catalyst retains its original form after reaction occurs
a proton is transferred between enzyme and substrate
a covalent bond forms between enzyme and substrate
two-part catalytic process (for example, the chymotrypsin mechanism)
use a nucleophilic function group
may use amino acids such as aspartate or lysine for protonation or proton abstraction
Explanation / Answer
The answers are-
catalysts may participate in oxidation-reduction reactions by changes in the oxidation state METAL ION CATALYSIS
a Zn2+ cofactor may properly orient the substrate in the active site through ionic interactions METAL ION CATALYSIS
may take part in interactions involving Fe2+ METAL ION CATALYSIS
lowers the energy or stabilizes the transition state or intermediate ALL
catalyst retains its original form after reaction occurs ALL
a proton is transferred between enzyme and substrate ACID BASE CATALYSIS
a covalent bond forms between enzyme and substrate COVALENT CATALYSIS
two-part catalytic process (for example, the chymotrypsin mechanism) COVALENT CATALYSIS
use a nucleophilic function group COVALENT CATALYSIS
may use amino acids such as aspartate or lysine for protonation or proton abstraction ACID-BASE CATALYSIS
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