Download STUDY GUIDE SECTION 7-1 Glycolysis and Fermentation

STUDY GUIDE SECTION 7-1
Glycolysis and Fermentation
Name _____________________
Period __________
Date ____________
Multiple Choice-Write the correct letter in the blank.
1. ______Glycolysis takes place
a. in the cytosol.
b. in the mitochondria.
c. only if oxygen is present.
d. only if oxygen is absent.
2. ______ Both lactic acid fermentation and alcoholic fermentation produce
a. a two-carbon molecule from a six-carbon molecule.
b. CO2 from a three-carbon molecule.
c. ATP from ADP and a phosphate.
d. NAD+ from NADH and H+.
3. ______ The efficiency of glycolysis is approximately
a. 0.2%
b. 2%
c. 20%
d. 200%
4. ______ The anaerobic pathways provide enough energy to meet all of the energy needs
of
a. all organisms.
c. many unicellular and some multicellular organisms.
b. no organisms.
d. all unicellular and most multicellular organisms.
Short Answer-Answer the following questions in complete sentences.
1. Explain the role of organic compounds in cellular respiration. ______________________
________________________________________________________________________
________________________________________________________________________
2. For each six-carbon molecule that begins glycolysis, identify how many molecules of
ATP are used, and how many molecules of ATP are produced.
ATP used: ________________________________________
ATP produced: _____________________________________
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3. Calculate the efficiency of glycolysis if 12 kcal of energy are required to transfer energy
from glucose to ATP. SHOW YOUR WORK.
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
4. Why are the fermentation pathways referred to as “anaerobic” pathways? ____________
_______________________________________________________________________
5. What are the energy-containing products of glycolysis? ___________________________
________________________________________________________________________
6. Of what importance are lactic acid fermentation and alcoholic fermentation to the cells
that use these pathways? ___________________________________________________
________________________________________________________________________
________________________________________________________________________
STRUCTURES AND FUNCTIONS The diagram below depicts the stages of fermentation.
Complete the diagram by writing the names of the pathways in the ovals and the names
of the molecules in the boxes.
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STUDY GUIDE SECTION 7-2
Aerobic Respiration
Multiple Choice-Write the correct letter in the blank.
1. ______ The breakdown product of glucose that diffuses into the mitochondrial matrix for
further breakdown is
a. acetyl CoA
b. pyruvic acid
c. oxaloacetic acid
d. citric acid
2. ______The starting substance of the Krebs cycle, which is regenerated at the end of the
cycle, is
a. acetyl CoA
b. pyruvic acid
c. oxaloacetic acid
d. citric acid
3. ______The Krebs cycle
a. produces two molecules of CO2.
b. produces a six-carbon molecule from six molecules of CO2.
c. produces NAD+ from NADH and H+.
d. generates most of the ATP produced in aerobic respiration.
4. ______The electron transport chain of aerobic respiration
a. generates O2 from H2O.
b. produces NADH by chemiosmosis.
c. pumps electrons into the mitochondrial matrix.
d. pumps protons into the space between the inner and outer mitochondrial membranes.
5. ______The maximum efficiency of aerobic respiration is approximately
a. 0.39%
b. 3.9%
c. 39%
d. 390%
Short Answer-Answer the following questions in complete sentences.
1. In what part of the mitochondria does the Krebs cycle take place? ___________________
2. In what part of the mitochondria does the electron transport chain occur? _____________
__________________________________________________________________________
3. Explain what happens to oxygen at the end of the electron transport chain. ____________
________________________________________________________________________
________________________________________________________________________
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4. List the two processes that together result in cellular respiration.
A. __________________________________________
B. __________________________________________
5. In the Krebs cycle, what molecule acquires most of the energy that is released by the
oxidation of acetyl CoA, and how many of these molecules are produced? _________
_____________________________________________________________________
6. Write the equation for the complete oxidation of glucose in aerobic respiration:
________________________________________________________________________
7. Explain why oxygen is required at the end of the electron transport chain. ____________
________________________________________________________________________
________________________________________________________________________
STRUCTURES AND FUNCTIONS Use the diagram below to answer the following questions.
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