Unit 3 Energy Flow Test 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.

Tags

NGSS.HS-PS1-4

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

• 6H₂O and 6CO₂

• 6CO₂ and C₆H₁₂O₆

• 6H₂O, C₆H₁₂O₆, and 6O₂

• C₆H₁₂O₆ and 6O₂

Tags

NGSS.HS-LS1-5

NGSS.HS-LS1-6

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

• exothermic
• catalyzed
• endothermic
• anabolic

Tags

NGSS.HS-PS1-4

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

In the graph to the right, an increase in temperature results in

• a decrease in the required activation energy.

• an increase in reaction rate.

• a decrease in the rate of reaction.

• an increase in both the reaction rate and activation energy.

Tags

NGSS.HS-PS1-5

Chemical reactions change ___ A ___ and make ___ B ___.

• reactants, products

• products, reactants

• energy, bonds

• bonds, energy

Tags

NGSS.HS-PS1-7