Unit 3 | Enzymes and Energetics Review (2023-2024)

What is the optimum temperature for this enzyme?

• 20 degrees Celsius

• 45 degrees Celsius

• 52 degrees Celsius

• 64 degrees Celsius

Which suffix (word ending) is used in the names of most enzymes?

• -ase

• -in

• -ine

• -ose

What can be inferred using the graph?

• Cells can function equally as well at all pH values.

• Cells do not function well at pH values that are too high or too low.

• Cells function best at high pH values.

• Cells function best at low pH values.

What is the optimum pH for the enzyme salivary amylase?

• 2

• 5

• 6.2

• 9.1

Enzymes are a type of which macromolecule?

• carbohydrate

• lipid

• protein

• nucleic acid

Why are enzymes needed for life?

• They speed up all the chemical reactions in living things.

• They are the main proteins that make up our body structure.

• The provide energy to all living things.

• They provide genetic information.

What is activation energy?

• the energy from the sun

• the energy produced by an enzyme

• the energy needed to get a reaction going

• none of these

What does it mean when an enzyme is denatured?

• that there is an acid around

• that the enzyme works faster

• that it is providing energy for the cell

• that the shape is changed of the active site & it no longer works

Which labeled part is the substrate?

• letter A

• letter B

• letter D

• letter E

Which model describes the active site of the enzyme changing shape slightly to fit the substrate?

• 'twisted ladder' model

• 'estimation' model

• 'induced fit' model

• 'lock and key' model