Which of these is exhibiting kinetic energy?
A Space station orbiting earth
Conservation of energy" refers to the fact that _____.
energy cannot be created or destroyed but can be converted from one form to another
Chemical energy is a form of _____ energy.
potential
In your body, what process converts the chemical energy found in glucose into the chemical energy found in ATP?
In your body, what process converts the chemical energy found in glucose into the chemical energy found in ATP?
cellular respiration
Which of these are by-products of cellular respiration?
heat, carbon dioxide, and water
Which part of the adenosine triphosphate molecule is released when it is hydrolyzed to provide energy for biological reactions?
The ?-phosphate is the primary phosphate group on the ATP molecule that is hydrolyzed when energy is needed to drive anabolic reactions. Located the farthest from the ribose sugar, it has a higher energy than either the ?- or ?-phosphate.
What type of reaction breaks the bonds that join the phosphate groups in an ATP molecule?
Hydrolysis involves breaking bonds with the addition of water.
Part complete
The following reaction
A --> B + C + heat
is a(n) _____ reaction.
exergonic
A(n) _____ reaction occurs spontaneously.
In exergonic reactions the products have less potential energy than the reactants.
Which of these reactions requires a net input of energy from its surroundings?
The products of endergonic reactions have more potential energy than the reactants.
In cells, what is usually the immediate source of energy for an endergonic reaction?
ATP
The reaction ADP + P --> ATP is a(n) _____ reaction.
endergonic
The energy for an endergonic reaction comes from a(n) _____ reaction.
The energy for an endergonic reaction comes from a(n) _____ reaction.
EXERGONIC
What is the fate of the phosphate group that is removed when ATP is converted to ADP?
It is acquired by a reactant in an endergonic reaction. (By acquiring the phosphate group the reactant acquires energy.)
What is energy coupling?
the use of energy released from an exergonic reaction to drive an endergonic reaction
In general, enzymes are what kinds of molecules?
Proteins
Enzymes work by _____.
Reducing energy activation
Enzyme
is an organic catalyst
What name is given to the reactants in an enzymatically catalyzed reaction?
substrate
As a result of its involvement in a reaction, an enzyme _____.
is uncharged
Consider a situation in which the enzyme is operating at optimum temperature and pH, and has been saturated with substrate. What is your best option for increasing the rate of the reaction?
Increase the enzyme concentration.
You have added an irreversible inhibitor to a sample of enzyme and substrate. At this point, the reaction has stopped completely.
The enzyme is inactive at this point. New enzyme must be added to regain enzyme activity.
You have an enzymatic reaction proceeding at the optimum pH and optimum temperature. You add a competitive inhibitor to the reaction and notice that the reaction slows down.
Add more substrate; it will outcompete the inhibitor and increase the reaction rate.
How does an enzyme increase the rate of the chemical reaction it catalyzes?
An enzyme reduces the free energy of activation (EA) of the reaction it catalyzes.
An enzyme catalyzes a reaction by lowering EA, enabling the reactant molecules to absorb enough energy to reach the transition state even at moderate temperatures. Read abo
If an enzyme is added to a solution where its substrate and product are in equilibrium, what will occur?
Nothing; the reaction will stay at equilibrium.
Some bacteria are metabolically active in hot springs because
their enzymes have high optimal temperatures.
If an enzyme in solution is saturated with substrate, the most effective way to obtain a faster yield of products is to
add more of the enzyme.
Which of the following statements about feedback regulation of a metabolic pathway is correct?
The final product of a metabolic pathway is usually the compound that regulates the pathway. note: It is quite common that the end product of the pathway controls the overall rate of the pathway.
49
Which of the following metabolic processes can occur wit
Choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as _______ is to _______.
exergonic; endergonic