Energy 1

Which phrase best describes an exothermic chemical reaction?

• Does not absorb any energy.

• Forms products with higher bond energy than reactants.

• Is in a state of equilibrium.

• Releases more energy than it absorbs.

Identify the products in this reaction: 6H₂O + 6CO₂ → C₆H₁₂O₆ + 6O₂

• H₂O and CO₂

• CO₂ and C₆H₁₂O₆

• H₂O, C₆H₁₂O₆, and O₂

• C₆H₁₂O₆ and O₂

Chemical reactions that absorb more energy than they release are considered to be ___.

• exothermic

• catalyzed

• endothermic

• anabolic

The activation energy needed for a chemical reaction is decreased by the presence of a ___.

• catalyst

• reactant

• product

• substrate

In the enzyme-substrate complex pictured below, what is happening during the second picture?

• The catalyzed reaction is releasing a product.

• The enzyme is breaking bonds in the substrate.

• The enzyme is keeping the bonds the same in the substrate.

• The substrate is beginning to bind to the enzyme.

If the activation energy of a biochemical reaction is lowered, then

• the reaction will happen faster.

• the reaction will happen more slowly.

• more energy will need to be absorbed.

• the rate of the reaction will be unaffected.

The molecule that an enzyme binds to is known as its ___.

• substrate

• monomer

• polymer

• complimentary base

Reactants bind to enzymes at the ___.

• substrate

• product

• activation energy

• active site

Which macromolecule found in the food you eat will your cells break down first to get ATP?

• Carbohydrates

• Lipids

• Proteins

• Nucleic Acids

What is the primary function of ATP in cellular activities?

• It acts as a catalyst.

• It provides structural support to the cell membrane.

• It serves as the primary energy currency of the cell.

• It stores genetic information.