BIOL 1911 : cell respiration p1.docx
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Question 2
Enzymes basically work by...
A. | Directly providing ATP for muscle contraction | |
B. | Lowering the activation energy required to drive the reaction | |
C. | Combining with NAD+ to provide energy | |
D. | Helping oxygen attach to substrate during metabolism | |
E. | Both A and B |
Anaerobic glycolysis yields a net gain of...
5 ATP | ||
10 ATP | ||
8 ATP | ||
2 ATP |
After a few minutes of easy jogging at a submaximal intensity, my oxygen consumption and heart rate reach a plateau and stay at that level for 20 to 30 minutes as I am jogging. With regards to oxygen consumption this would be an example of ...
A. | intermittent exercise | |
B. | an oxygen deficit | |
C. | incremental exercise | |
D. | a steady state | |
E. | homeostasis |
Question 17
The RQ measured for a subject who has been jogging easily at 70% VO2max for about 40 minutes and is in a steady state will likely be?
A. | over 1.0 | |
B. | close to .7 | |
C. | close to .5 | |
D. | close to .9 |
Question 57
A person exercises in their âfat burning zoneâ for 4 hours at 35% VO2peak. The O2 cost of exercise at that work rate is 0.5L/minute. Following exercise the subject rewards himself with an ice-cream sundae (700kcal). The following statement is true(assume 5kcal/lit of O2):
A. | The subject is in neutral energy balance | |
B. | The subject consumed fewer calories than they expended during exercise | |
C. | The subject consumed more calories than they expended during exercise | |
D. | Canât say |
1. Complete the following chart:
Organism | Metabolizes oxygen | Growth in presence of oxygen | Growth in absence of oxygen | detoxifies byproduct of oxygen |
Aerobe | ||||
Facultative anaerobe | ||||
Strict anaerobe | ||||
Aerotolerant | ||||
Microaerophile |
2. Compare the results with growth on the aerobic control plate and describe the oxygen requirements of your organisms.
3. If an organism is a strict anaerobe, it cannot survive in the presence of oxygen even for a short time. How might you culture these organisms?
4. An aerobe, facultative anaerobe, strict anaerobe, and an aerotolerant anaerobe are inoculated on a medium in a sealed container with oxygen present. Explain what will happen.