1/11:Enzymes and Metabolic Pathways Quiz

What is the role of enzymes in metabolic pathways?

• To change the type of chemical reactions

• To stop chemical reactions

• To speed up chemical reactions

• To slow down chemical reactions

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-5

How do enzymes function as molecular catalysts?

• By preventing substrate binding

• By increasing activation energy barriers

• By changing the shape of the substrate

• By decreasing activation energy barriers

Tags

NGSS.HS-PS1-5

Which part of the enzyme interacts (binds) with the substrate is called which of the following?

• Allosteric site

• Cofactor

• Active site

• Coenzyme

What can alter the shape of the enzyme's active site?

• Change in temperatures

• Presence of substrate

• Feedback inhibition

• Change in pH

Which environmental factor can alter the shape of the active site and lead to enzyme denaturation?

• High temperature

• Low temperature

• High pH

• Low pH

What type of regulation occurs when inhibitor molecule is similar enough to a substrate bind to the active site and simply block the substrate from binding?

• Noncompetitive inhibition

• Competitive inhibition

• Feedback inhibition

• Allosteric regulation

Under what conditions does trypsin, an enzyme in the human small intestine, work most efficiently?

• Low pH

• High pH

• Neutral pH

• High temperature

What can act competitively by binding to the enzyme's active site?

• Activators

• Cofactors

• Coenzymes

• Inhibitors

What is the optimal pH for pepsin, an enzyme in the stomach?

• Neutral pH levels

• Basic pH levels

• High pH levels

• Acidic pH levels

What can alter the shape of the active site of an enzyme?

• Coenzymes and cofactors

• Feedback inhibition

• Temperature and pH

• Presence of substrate