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Regulation of Enzymatic Activity – Metabolism and Regulation

by Kevin Ahern, PhD
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    About the Lecture

    The lecture Regulation of Enzymatic Activity – Metabolism and Regulation by Kevin Ahern, PhD is from the course Biochemistry: Basics.


    Included Quiz Questions

    1. Small molecules are essential for allosterism
    2. Allosterism involves phosphorylation/dephosphorylation
    3. Covalent modification cannot include any breaking of peptide bonds
    4. Sequestration is the primary means cells use
    1. The covalent modification in the zymogens leads to the deactivation of the digestive enzymes
    2. The zymogen or a proenzyme is an inactive precursor of an enzyme, which requires a biochemical change to expose its active site to start catalysis
    3. The pancreatic enzymes are secreted in the form of zymogens to prevent their activities against body proteins
    4. An enzyme pepsinogen is an inactive form of the enzyme pepsin
    5. The typical examples of zymogens are angiotensinogen, trypsinogen, chymotrypsinogen, and pepsinogen
    1. Feedback mechanism — controlling a central metabolic pathway by inhibiting the synthesis of the last enzyme of the pathway via end product molecules
    2. Allosterism — binding of allosteric effectors at allosteric sites modulate the enzyme activities
    3. Irreversible covalent modifications — maturation of zymogens
    4. Reversible covalent modifications — addition or removal of the phosphoryl group to control glycogen metabolism
    5. Enzyme synthesis control — by controlling the transcription of mRNA of specific gene in response to the cell surroundings

    Author of lecture Regulation of Enzymatic Activity – Metabolism and Regulation

     Kevin Ahern, PhD

    Kevin Ahern, PhD


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