This is a powerpoint with questions on fermentation.

1. Fermentation
Biology 1A

2. Fermentation

3. !
Glycolysis Glucose
CYTOPLASM
+ +
NAD NAD
cycles cycles
back back
2 Pyruvic Acid
2 CO 2 !
A B
2 Ethyl Alcohol 2 Lactic Acid
A. Is this alcoholic fermentation or
lactic acid fermentation?
B. Is this alcoholic fermentation or
lactic acid fermentation?

4. Alcoholic fermentation is used to make
which product(s)?
A.bread
B.cheese
C.yogurt
D.pickles

5. What kind of taste do lactic acid bacteria
give foods?
A. Sweet
B. Salty
C. Sour
D. Spicy

6. What are some milk products made from
lactic acid fermentation?
A. Milk
B. Sour cream
C. Yogurt
D. Cheese

7. What is a difference between fermentation
and aerobic respiration?

8. What is a difference between fermentation
and aerobic respiration?

9. When short bursts of energy are needed, the
body uses the ATP stored in muscles and ATP
made by lactic acid fermentation.
Cellular respiration is the only way to
produce enough ATP for exercise longer than
about 90 seconds.
The timeline below represents the amount of
time a person has been running. The time
increments are in 30-second intervals for a
total of 6 minutes.
About where on the timeline would each form of
energy start and stop?
! Minutes!
0! 0.5! 1! 1.5! 2! 2.5! 3! 3.5! 4! 4.5! 5! 5.5! 6!

10. 1. At what time does the runner’s body switch
from energy supplied by lactic acid to energy
supplied by cellular respiration?
2. Circle the correct answer. Which process
gives a runner more energy?
A. cellular respiration
B. lactic acid fermentation
3. Circle the correct answer. You are in a
race that lasts 25 minutes. Where will your
body get the energy it needs?
A. breakdown of glucose
B. breakdown of fats
4. Compare the ATP production of a sprinter
and that of a long-distance runner.

11. _____ 13. The air bubbles and spongy texture
of bread are due to which process?
a. lactic acid fermentation
b. glycolysis
c. alcoholic fermentation
d. the Krebs cycle

12. _____ 14. The conversion of pyruvic acid into
lactic acid requires
a. alcohol.
b. oxygen.
c. ATP.
d. NADH.

13. Indicate whether the statement is true or false. If
false, change the underlined word or phrase to make the
statement true.
16. Cellular respiration releases energy by
breaking down glucose in the presence of
carbon dioxide.
17. The reactants of photosynthesis are the
same as the reactants of cellular respiration.
18. The Krebs cycle releases energy in the
form of ATP.
19. Without the Krebs cycle, the electron
transport chain cannot function.
20. The first few seconds of intense exercise
use up the cell’s stores of fat.

14. A scientist set up a respiration chamber as
shown below. She placed a mouse in flask B.
Into flasks A, C, and D, she poured distilled
water mixed with the acid-base indicator
phenolphthalein. In the presence of CO2,
phenolphthalein turns from pink to clear. She
allowed the mouse to stay in the chamber for
about an hour.
!

15. !
Write the equation for cellular respiration.
Based on this equation and the setup shown
above, what substance(s) would you expect the
mouse in flask B to give off?

16. !
What will the mouse require to carry out
cellular respiration? Look at the flasks
above. Describe the flow of materials through
the flasks. Will the mouse receive fresh air
so that it can survive?

17. !
Based on Figure 9–2, how will the scientist be
able to detect whether the mouse is carrying
out cellular respiration? Explain your answer.