Allosteric Regulation Quiz

What is allosteric regulation?

• The activities of enzyme are affected by the binding of regulatory molecule at the active site.

• Enzyme activity is only affected by the substrate concentration.

• The activities of enzyme are affected by the binding of regulatory molecule at the allosteric site.

• Enzyme activity is not affected by any regulatory molecules.

What can regulatory molecules be in allosteric regulation?

• Both inhibitors and activators

• Neither inhibitors nor activators

• Only inhibitors

• Only activators

How does an inhibitor affect the allosteric enzyme?

• Reduce the enzyme activity by adopting the inactive shape

• Reduces the enzyme activity by adopting the active shape

• Causes the enzyme to adopt the active shape

What is the typical reaction catalyzed by oxidoreductases?

• Transfer of functional groups

• Formation of two products by hydrolysis

• Intramolecular rearrangement

• Oxidation/reduction reactions

What is the function of transferases?

• Rearrangement of atoms within a molecule

• Formation of two products by hydrolysis

• Transfer of functional groups between substances

• Removal of H atoms from substrates

What do hydrolases do?

• Transfer of functional groups

• Removal or addition of groups of atoms without hydrolysis

• Formation of two products by hydrolysis

• Intramolecular rearrangement

What is the typical reaction catalyzed by lyases?

• Formation of two products by hydrolysis

• Intramolecular rearrangement

• Removal or addition of groups of atoms without hydrolysis

• Transfer of functional groups

What is the function of isomerases?

• Transfer of functional groups

• Formation of two products by hydrolysis

• Oxidation/reduction reactions

• Rearrangement of atoms within a molecule

What do ligases do?

• Formation of two products by hydrolysis

• Intramolecular rearrangement

• Join two molecules together with simultaneous breakdown of ATP

• Transfer of functional groups

What is the effect of end products in feedback inhibition?

• Increase the rate of production

• Have no effect on the pathway

• Promote enzyme activity

• Switch off the pathway by inhibiting the first enzyme