Chapter 8: Metabolism

The induced fit model of enzyme activity suggests which of the following?

• the binding of substrate depends on the conformation of the active site
• the binding of an activator alters the active site to enable binding of products more tightly
• binding of substrate changes the conformation of the active site to bind substrate more tightly
• binding of competitive inhibitors changes the shape of the active site to bind substrate less tightly

Metabolism is best described as______

• synthesis of macromolecules
• breakdown of macromolecules
• control of enzyme activity
• control of enzyme activity in the synthesis and breakdown of macromolecules

Tags

NGSS.HS-LS1-7

Choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as _____ is to _____.

• exergonic; endergonic
• free energy; entropy
• work; energy
• entropy; enthalpy

Tags

NGSS.HS-LS1-7

How do enzymes function?

• They lower the activation energy necessary for a   reaction to occur.
• They raise the activation energy necessary for a reaction to occur .
• They change the pH of a reaction.
• They cause the reaction to denature.

Which of the following do not affect enzymes ability to function?

• pH
• substrate
• temperature
• water

The __________ law of thermodynamics states that entropy is always increasing. 

• first
• second
• third
• zeroth

What does an endergonic reaction do with energy?

• Releases energy
• Stores energy

Tags

NGSS.HS-PS1-4

A catalyst works by

• changing the order of the reaction
• increasing the temperature
• lowering the activation energy
• making the activated complex

Endergonic reactions require:

• an input of energy
• a release of energy
• do not change energy

Tags

NGSS.HS-PS1-4

The part of the enzyme that the substrate bonds to is called the _____.

• active site
• activation energy
• bond site
• peptide bond