酵素：练习题

• a.

  The activation energy of the reaction has increased beyond the capacity of the enzyme.

• b.

  The high substrate concentration causes the globular structure of the enzyme to denature.

• c.

  All the active sites of the enzyme molecules are occupied, and the enzyme concentration becomes the limiting factor.

• d.

  The substrate molecules are acting as competitive inhibitors at high concentrations.

• a.

  The reaction stops completely because non-competitive inhibitors always bind to the active site covalently.

• b.

  The affinity for the substrate increases because the inhibitor stabilizes the enzyme-substrate complex.

• c.

  The \(V_{max}\) decreases because the inhibitor reduces the number of functional enzyme molecules, regardless of substrate concentration.

• d.

  The \(V_{max}\) remains the same because the inhibitor can be displaced by increasing the substrate concentration.

• a.

  The substrate changes its chemical structure to match the rigid shape of the enzyme's active site.

• b.

  The enzyme's primary structure is altered permanently to accommodate different types of substrates.

• c.

  Competitive inhibitors change the shape of the active site so the substrate can no longer bind.

• d.

  The active site is flexible and undergoes a conformational change to wrap more tightly around the substrate upon binding.

先自己写一遍答案，再对照解题步骤。

先自己写一遍答案，再对照解题步骤。

先自己写一遍答案，再对照解题步骤。