Acc. Bio Metabolism and Enzymes (chapter 6)

In which type of Inhibition where the inhibitor binds to the same active site of the substrate?

• Uncompetitive

• Non competitive

• Competitive

• All of the above

Which domain of an enzyme is non-protein?

• Active site

• The stabilizing body

• The upper most region

• Co-factor

A catalyst works by

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

If the temperature is reduced to 27 degree celcius, a reaction rate will ______

• increase

• decrease

• stay the same

If the concentration of a reactant is increased, the reaction rate will ___________.

• increase

• decrease

• stay the same

Graph a is the normal enzyme plot of rate of reaction vs substrate concentration. Graph b and c are the graphs plotted with inhibitors. Graph ____ is a __________ type of inhibition with a lowered V_max.

• b, competitive

• b, noncompetitive

• c, competitive

• c, noncompetitive

Activation energy

• increases the amount of product

• increased using a catalyst

• lowered using a catalyst

• lowers the amount of product

Maltase is the enzyme that breaks apart

• maltose

• lactose

• sucrose

• Peptidase

Lactose + water --> glucose + galactose

Activation energy in this reaction is lowered when lactase presents. What is the function of the activation energy?

• Break the bond in lactose

• Break the bond in glucose and galactose

• Build the bond in lactose

• Build the bond in glucose and galactose

What is a substance called if it speeds up a chemical reaction?

• reusable
• catalyst
• specific
• fragile