Semester 2 Biology Final

Which phrase best describes an exothermic chemical reaction?

• does not absorb any energy

• forms products with higher bond energy than reactants

• releases more energy than it absorbs 

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

    

• A. 6H2O and 6CO2

• B. 6CO2 and C6H12O6

•   C. C6H12O6 and 6O2

Chemical reactions that absorb more energy than they release are called

• A. exothermic

• B. catalyzed

• C. endothermic

The activation energy needed for a chemical reaction is decreased by a

• A. catalyst

• B. reactant

• C. product

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

• A. the reaction will happen faster

• B. the reaction will happen more slowly

• C. this will not affect the rate of the reaction

Which macromolecule is an enzyme?

• A. Carbohydrate

• B. Lipid

• C. Protein

The molecule that an enzyme binds to is known as its

• A. substrate

• B. monomer

• C. polymer

The energy required to get a reaction started is known as the:

• A. Exothermic Ability

• B. Activation Energy

• C. Reactant

An enzyme that has lost its shape and can no longer function properly is said to be:

• Denatured

• B. Activated

In the enzyme activity lab, students had tennis balls taped into their hands to represent a competitive inhibitor. What is the impact of a competitive inhibitor on a reaction?

• Speeds it up

• slows it down

• no impact