Chapter 6 Evaluation Energy Flow in the Life of a Cell.
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- Q1
Entropy is a measure of an increase in
kinetic energy.
randomness.
orderliness.
potential energy.
45s - Q2
Energy that is not converted to useful energy is usually given off as
electricity.
light.
heat.
radioactivity.
45s - Q3
Which of the following is part of the first law of thermodynamics?
Energy cannot be transferred or transformed.
Exergonic reactions are coupled with endergonic reactions.
Energy cannot be created or destroyed.
Kinetic energy is stored energy.
45s - Q4
What is the ultimate source of energy for almost all forms of life on Earth?
Heat energy
Nuclear energy
Chemical energy
Solar energy
45s - Q5
In exergonic chemical reactions
the reactants have more energy than the products.
the reactants and products possess equal amounts of energy.
the reactants have less energy than the products.
energy is stored by the reactions.
45s - Q6
When solid sodium hydroxide is added to water, the solution gets hot. This is anexample of a(n)
exergonic reaction.
endergonic reaction.
enzime-catalyzed process.
release of activation energy.
45s - Q7
Activation energy is necessary for all ________ reactions.
exergonic
chemical
coupled
endergonic
45s - Q8
When, if ever, do molecules stop moving?
At absolute zero (-273.15°C)
At the boiling point (100°C)
Never
At the freezing point (0°C)
45s - Q9
An ________ chemical reaction releases energy, whereas an ________ reaction requires an input of energy.
exergonic; endergonic
endergonic; enzymatic
endergonic; exergonic
enzymatic; endergonic
45s - Q10
The most common energy carrier molecule in living organisms is
ATP
ADP
Glucose
DNA
45s - Q11
When a muscle cell demands energy to perform its work of contraction, ATP
is broken down.
manufactures more ATP.
enters a metabolic pathway.
catalyzes the reaction.
45s - Q12
Which molecule functions in the short-term storage of energy?
Glycogen
Steroids
Phospholipids
ATP
45s - Q13
ATP is an energy carrier. Where is the energy actually located?
in the bonds between phosphate groups.
between the sugar and the phosphate.
attached to the phosphate group.
attached to the nucleotide.
45s - Q14
FADH2 is an example of a(n)
enzyme.
electron carrier.
protein.
active site.
45s - Q15
Which of the following lowers the activation energy of a biochemical reaction?
High temperature.
Presence of a catalyst.
Altering pH to 7.
Low concentration of reactants.
45s