Enzyme/ATP Question Preview (ID: 48529)


Concept 1 And 2.

What is denaturation?
a) when an enzyme is given special powers to work better
b) when the rate of a reaction will happen faster
c) when an enzyme's active site gets deformed and loses is specific shape
d) when enzymes work at a faster rate

What does a competitive inhibitor do?
a) It competes with the substrate for the active site and slows down the reaction
b) It speeds up the rate of the reaction
c) It helps the reactants to react faster
d) It does not affect a reaction at all.

What is a catalyst?
a) increases the activation energy
b) like an enzyme and it lowers the activation energy
c) it is like an inhibitor and stops reactions
d) it does nothing

How does substrate concentration change the rate of a chemical reaction?
a) The higher the substrate, the slower the rate of reaction
b) The lower the substrate the faster the rate of reaction
c) The higher the substrate the faster the rate of reaction
d) There is no change

Increasing the temperature of the reaction will do what?
a) increase the rate of the reaction
b) stop the reaction
c) lower the rate of the reaction
d) cook all of the reactants

Where does your body get the energy for reattaching a third phosphate to ADP, creating ADP?
a) from the sun
b) usually from carbs
c) from nucleic acids
d) from breaking ATP

Which of the following reactions DIRECTLY provides chemical energy for most cell functions?
a) ADP = ATP + P
b) ADP + P = ATP
c) ATP + P = ADP
d) ATP = ADP + P

Which phrase BEST describes the function of the ATP molecule?
a) absorbs energy
b) increases energy
c) stores energy
d) creates energy

Energy is released from an ATP molecule for cellular processes when it
a) converts a phosphate group to ADP
b) attaches an extra phosphate group
c) loses a phospate group
d) produces a sugar molecule

Reactants bind to enzymes at the
a) substrate
b) product
c) activation energy
d) active site

Which macromolecule found in the food you eat will your cells break down FIRST to get ATP?
a) carbohydrates
b) lipids
c) proteins
d) nucleic acids

The molecule that an enzyme binds to is known as its
a) substrate
b) monomer
c) polymer
d) matching base

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
d) the reaction will not happen at all

The activation energy needed for a chemical reaction is DECREASED by a
a) catalyst (enzyme)
b) reactant
c) product
d) substrate

Identify the PRODUCTS in this reaction: 6H20 + 6 CO2 = C6H12O6 + 6O2
a) 6H20 and 6CO2
b) 6H20, C6H12O6, and 6CO2
c) 6CO2 and C6H12O6
d) C6H12O6 and 6O2

Chemical reactions that ABSORB more energy than they release are called
a) exothermic
b) catalyzed
c) endothermic
d) activated

What phrase best describes an exothermic reaction?
a) does not absorb energy
b) forms products with higher bond energy than reactants
c) is in a state of equilibrium
d) releases more energy than it absorbs

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