Cell Metabolism Part 1 Concept Review
by John Lundy
| 16 Questions
Note from the author:
A review assignment examining the foundational concepts of energy and energy stored in chemical bonds.
Look at each of the processes shown above, then discuss with a friend, if it is endergonic or exergonic. In each case, does enthalpy increase or decrease, and does entropy increase or decrease?
Consider a pendulum swinging. Which type(s) of
energy is/are associated with the pendulum in the
following instances:
i. the moment at which it completes
one cycle, just before it begins to fall back towards the
other end,
ii. the moment that it is in the middle between
the two ends,
iii. just before it reaches the end of one cycle
(just before instant i.).

a. i. potential and kinetic, ii. potential and kinetic,
iii. kinetic
b. i. potential, ii. potential and kinetic, iii. potential
and kinetic
c. i. potential, ii. kinetic, iii. potential and kinetic
d. i. potential and kinetic, ii. kinetic iii. kinetic
Which of the following comparisons or contrasts
between endergonic and exergonic reactions is false?
a. Endergonic reactions have a positive ΔG and
exergonic reactions have a negative ΔG
b. Endergonic reactions consume energy and
exergonic reactions release energy
c. Both endergonic and exergonic reactions require
a small amount of energy to overcome an
activation barrier
d. Endergonic reactions take place slowly and
exergonic reactions take place quickly
Which of the following is the best way to judge the
relative activation energies between two given chemical
a. Compare the ΔG values between the two
b. Compare their reaction rates
c. Compare their ideal environmental conditions
d. Compare the spontaneity between the two
Which of the following is not an example of an energy
a. Turning on a light switch
b. Solar panels at work
c. Formation of static electricity
d. None of the above
Label each of the following systems as high or low
entropy: i. the instant that a perfume bottle is sprayed
compared with 30 seconds later, ii. an old 1950s car
Chapter 6 | Metabolism 189
compared with a brand new car, and iii. a living cell
compared with a dead cell.
a. i. low, ii. high, iii. low
b. i. low, ii. high, iii. high
c. i. high, ii. low, iii. high
d. i. high, ii. low, iii. Low
Explain in your own words the difference between a
spontaneous reaction and one that occurs instantaneously,
and what causes this difference.

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