Cell Metabolism Part 1 Concept Review

1

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?

1

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

1

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

1

Which of the following is the best way to judge the
relative activation energies between two given chemical
reactions?

a. Compare the ΔG values between the two

reactions

b. Compare their reaction rates

c. Compare their ideal environmental conditions

d. Compare the spontaneity between the two

reactions

1

Which of the following is not an example of an energy
transformation?

a. Turning on a light switch

b. Solar panels at work

c. Formation of static electricity

d. None of the above

1

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

1

Explain in your own words the difference between a
spontaneous reaction and one that occurs instantaneously,
and what causes this difference.

1

Cell Metabolism Part 1 Concept Review

Which of the following comparisons or contrastsbetween endergonic and exergonic reactions is false?

Which of the following is the best way to judge therelative activation energies between two given chemicalreactions?

Which of the following is not an example of an energytransformation?

Label each of the following systems as high or lowentropy: i. the instant that a perfume bottle is sprayedcompared with 30 seconds later, ii. an old 1950s carChapter 6 | Metabolism 189compared with a brand new car, and iii. a living cellcompared with a dead cell.

Explain in your own words the difference between aspontaneous reaction and one that occurs instantaneously,and what causes this difference.

Which of the following comparisons or contrastsbetween endergonic and exergonic reactions is false?

Which of the following is the best way to judge therelative activation energies between two given chemicalreactions?

Which of the following is not an example of an energytransformation?

Label each of the following systems as high or lowentropy: i. the instant that a perfume bottle is sprayedcompared with 30 seconds later, ii. an old 1950s carChapter 6 | Metabolism 189compared with a brand new car, and iii. a living cellcompared with a dead cell.

Explain in your own words the difference between aspontaneous reaction and one that occurs instantaneously,and what causes this difference.

Which of the following comparisons or contrasts
between endergonic and exergonic reactions is false?

Which of the following is the best way to judge the
relative activation energies between two given chemical
reactions?

Which of the following is not an example of an energy
transformation?

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.

Explain in your own words the difference between a
spontaneous reaction and one that occurs instantaneously,
and what causes this difference.

Which of the following comparisons or contrasts
between endergonic and exergonic reactions is false?

Which of the following is the best way to judge the
relative activation energies between two given chemical
reactions?

Which of the following is not an example of an energy
transformation?

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.

Explain in your own words the difference between a
spontaneous reaction and one that occurs instantaneously,
and what causes this difference.