Option C - Biochemistry
Cell Respiration
Use the videos to help you answer questions:
Cell Respiration
Overview:
http://www.youtube.com/watch?v=iXmw3fR8fh0&feature=related
Songs:
http://www.youtube.com/watch?v=jJvAL-iiLnQ&feature=related
http://www.youtube.com/watch?v=sCNc0OY__tM
Glycolysis
http://www.youtube.com/watch?v=ub1zTkZL5sE&feature=related
http://www.youtube.com/watch?v=x-stLxqPt6E
Link Reaction
http://www.youtube.com/watch?v=-LO9pP3dF3Q
KREBS CYCLE
http://www.youtube.com/watch?v=3wCGkmfEV9I&feature=related
http://www.youtube.com/watch?v=aCypoN3X7KQ
ATP Synthesis
http://www.youtube.com/watch?v=KXsxJNXaT7w&feature=related
http://www.youtube.com/watch?v=1engJR_XWVU&feature=related
http://www.youtube.com/watch?v=QHmdJtiaNYg&feature=related
http://www.youtube.com/watch?v=Idy2XAlZIVA&feature=related
http://www.youtube.com/watch?v=StXlo1W3Gvg&feature=related
1. Draw and label a mitochondrion (use the diagram as a guide)
2. List the four stages of Cellular respiration:
i.
ii.
iii.
iv.
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3. State where glycolysis occurs.
4. In the table, indicate the four stages of glycolysis.
Stages of Glycolysis
Outline each stage of Glycolysis
Two phosphate groups are added to 1 glucose molecule to create 1 hexose
biphosphate molecule. The phosphate groups are provided by 2 ATP molecules.
The hexose biphosphate molecule is broken into 2 molecules of triose
phosphate.
Two atoms of hydrogen are removed from each triose phosphate molecule and
added to 2 molecules of NAD+.
Pyruvate is formed by transferring 2 phosphate groups from each triosephosphate molecule to 4 molecules of ADP.
5. Put all these pieces together to show the reactions and products of glycolysis.
6. Complete the table to show the number of each product of glycolysis
Product of Glycolysis
Number of
molecules produced
Pyruvate
ATP
NADH
H+
2
7. Fill in the blanks:
hint OIL RIG
oxidation is the ………..……………….. of electrons from an element
reduction is the ………………………… of electrons
oxidation frequently involves gaining ………………….. or losing ……………………
reduction frequently involves losing ………………………. or gaining …………………….
8. Put all these pieces together to show the reactions and products of glycolysis.
9. Quiz: True or False
i.
Glycolysis occurs in the mitochondrion
ii.
Glycolysis produces 1 pyruvate molecule.
iii.
Most of the energy that was stored in the glucose molecule is still present in the 2 pyruvate molecules.
iv.
When oxygen is present, pyruvate is transported to the mitochondrial matrix
v.
vi.
vii.
viii.
The link reaction forms a link between glycolysis and the Krebs cycle.
The link reaction involves oxidative decarboxylation of pyruvate
The link reaction involves the reduction of NADH to NAD+
The link reaction produces acetyl coenzyme A (acetyl CoA) and CO2.
10. Put all these pieces together to show the citric acid cycle.
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11. Complete the table to show the number of each product of glycolysis
Product of Glycolysis
Number of
molecules produced
CO2
ATP
NADH + H+
FADH2
12. Quiz: True or False
i.
ii.
iii.
iv.
v.
vi.
The Krebs cycle is a series of reactions that occurs in a mitochondrion.
The Krebs cycle begins with the entry of a 4-carbon molecule.
The first 6-carbon product in the Krebs cycle is citrate.
CO2 is removed in 1 of the reactions of the Krebs cycle
ATP is produced directly in 2 of the reactions (substrate-level phosphorylation)
For each glucose molecule (at the start of glycolysis) there will be 2 turns of the Krebs cycle.
13. Fill in the blanks

The last step of aerobic respiration is called …………………………………………..

In this step electrons and hydrogens from ……………………….. and …………………………. are passed
along an ……………………………………………chain from one carrier molecule to another.

The electron carriers are strategically located in the ……………………………………. membrane of the
…………………………….. They are mainly proteins that shift between ……………… and ………… states as
they accept and donate electrons.

The final electron carrier is ………………………….. which bonds with H+ to form water.

As the electrons are passed down the electron transport chain, ……………………….. are pumped across the
membrane into the ……………………………… space. This creates a ……………………………., which is a
store of potential energy, and in turn powers the synthesis of ATP.

The inner membrane of a mitochondrion is impermeable to protons but they flow back into the matrix
through ATP …………………………………. molecules that are embedded in the membrane.

As the ions flow down the gradient, …………………………… is released and used to phosphorylate ADP.
When ATP synthesis is coupled to a concentration gradient of H+ it is called……………………..
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14. Put all these pieces together to show the electron transport chain.
15. Complete the table to show the functions of the mitochondrion’s structures.
Mitochondrion
Function
.
Matrix
Inter- membrane
space
Cristae
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16. Complete the cellular respiration crossword
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