Enzymes & Energy

How do enzymes speed up chemical reaction?

• Increasing activation energy

• Decreasing activation energy

• Increasing deactivation energy

• Decreasing deactivation energy

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

• reusable
• catalyst
• specific
• fragile

Each enzyme only has 1 substrate that will fit its active site.  What is this called?

• reusablility
• denaturation
• specificity
• fragility

Enzymes are..

• lipids

• carbohydrates

• proteins

• nucleic acids

What is made and used by cells to speed up the rate of reaction?

• carbohydrates

• pH regulators

• nucleic acids

• catalysts

In a chemical reaction, a reactant binds to an enzyme at a region known as the...

• catalyst

• substrate

• product

• active site

The energy that is needed to get a chemical reaction started is called...

• exothermic energy

• activation energy

• activation catalyst

• endothermic energy

What is the purpose of enzymes?

• slow down chemical reactions in a cell

• regulate the size of a cell

• regulate the shape of a cell

• speed up chemical reactions in a cell

What are the reactants of enzyme-catalyzed reactions?

• active sites

• subunits

• substrates

• products

Enzymes are lipids that act as biological catalysts.

• True

• False