- Take-home
on Cellular
Respiration:
PPAO 3:
- Mol.
Bio. 3 final grade value: 37%
- PPAO 3
Details:
- Essays: Write complete
answers with drawings to 1 question from
each QFYC group A-C listed below plus one more from any QFYC
group
A, B or C. (Total: 4 questions)
- Make
sure you
clearly indicate which group and which question you are attempting to
answer.
Please write the question before you answer it.
- Graphic
support is required for full credit. (20% of each question)
- Date:
See Due
Dates Listing.
- PPAO 3 Essays
- Group
A:
- 1. How are nucleotides used in
cellular respiration? (You can do this one
after we have discussed cellular respiration through the end of
electron transport.)
- 2.
What is the
specific role of oxygen in a cell? What happens when cells are
deprived
of oxygen? (You can do this one
after we have discussed cellular respiration through the end of
electron transport.... In 2008... read Campbell!)
- Group B:
- 1.
Mitochondria
are often referred to as the power plants of the cell. Justify this
description.
Be specific. (You can do this one
after we have discussed cellular respiration through the end of
electron transport. Make sure you discuss how coal fired power plants work and are similar to mitochondria as I did in class.)
- 2.
Draw a mitochondrion
in detail and include the following:
- a) Relative size
of a mitochondrion in comparison to a RBC, a chloroplast and a
bacterium (See handout from Dr.
D.)
- b) General structure
with labels
- c)
Locations of
Krebs cycle, electron transport, FoF1 complexes [a.k.a., ATP Synthase].
(Include
magnification drawings as needed which do not need to show every detail, but at least basic structure and inputs and outputs.)
- d) Location of
mitochondrial DNA and ribosomes.
- Group C:
- 1. How does
the citric acid cycle
work? What is its purpose? (You can do this one
after we have discussed glycolysis, Krebs cycle and beta-oxidation of
fats.)
- 2.
In the combustion
of glucose, describe the forms of energy and calculate the % of
the
total glucose energy (686 kcal/mole) found after a) glycolysis, b)
Krebs
cycle, and c) oxidative phosphorylation. Make sure you explain where
the
lost energy went. Other energy values: NADH: 52.5 kcal/mole; FADH2:
36 kcal/mole; pyruvate: 268 kcal/mole; ATP: 7.3 kcal/mole (You
can do this one after we have discussed how the logic works for this
question... I have a panel. )
- 3.
Why do some
cells produce 36 ATP per glucose while some produce 38? (Show how this
happens.) (You can do this one
after we have discussed how the 2 NADH created in glycolysis gain entry
to mitochondria. (See handout from Dr.
D.))
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