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Metabolic Processes: Review QuestionsPart 1 Cellular Respiration Questions
1. Complete the chart by stating whether the compound is a NEED (N)
and/or a PRODUCT (P) and which process it is seen in. The first two
rows have been completed as examples.
COMPOUN GLYCOLYSIS TRANSITION KREBS ETC
D
C6H12O6 N
NADH P P P N
ATP N/P P P
FAD N
CO2 P P
NAD N N N P
H2O P
O2 (as O) N
FADH2 P
ADP P/N N N
2. Write the equation for cellular respiration. Using arrows, briefly state
where each compound comes from/goes to.
from food from air to air excess energy
out via
sweat/urine
3. List three similarities and three differences between the two
fermentation processes.
Similarities:
Both are anaerobic/don’t require oxygen
Both follow glycolysis and start with pyruvate
Both recycle NAD+
Differences: (LAF = lactic acid fermentation; AF = alcohol fermentation)
LAF produces one 3-C lactic acid per pyruvate
, AF produces one CO2 and one 2-C ethanol per pyruvate
LAR occurs in mammal muscles
AF occurs in yeast and some bacteria
4. Total up the ATP, NADH, FADH2, and CO2 from Pyruvate Oxidation
and Krebs. Remember that everything occurs twice because two
pyruvic acids are produced in Glycolysis.
Compound Pyruvate Oxidation Krebs
ATP 0 2
NADH 2 6
FADH2 0 2
CO2 2 4
5. In the ETC, what is the final electron acceptor? How does the ATP
count work in the ETC?
Final e- acceptor is O2.
For every NADH (and there are 10) 3 ATP are made → 30 ATP
For every FADH2 (and there are 2) 2 ATP are made → 4 ATP
6. Respiration can produce up to how many molecules of ATP from 1
molecule of glucose? Up to 38 ATP.
7. Which stage(s) of respiration produces ATP via oxidative phosphorylation?
Substrate-level phosphorylation?
oxidative - ETC
substrate level - Glycolysis and Krebs
8. Complete the following summary reaction for respiration:
C6H12O6 + 6O2 → 6CO2 + 6H2O + ATP
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