1. Arrange the following steps of cellular respiration in their proper order. 1)
ID: 58566 • Letter: 1
Question
1. Arrange the following steps of cellular respiration in their proper order.
1) Pyruvate oxidation
2) Chemiosmosis
3) Citric Acid Cycle
4) Electron Transport
5) Transport of glucose into cell
6) Glycolysis
2. What is the difference between a strict anaerobe and a facultative anaerobe?
3. Explain oxidative phosphorylation in your own words. Include a sketch!
4. Which of the two phosphorylation mechanisms, oxidative phosphorylation or substrate-level phosphorylation, is likely to have appeared first in evolution? Why?
1) Explain why we say nearly all life on Earth ultimately depends on the sun for energy.
2) Why do the photosynthetic tissues of plants look green?
3) What are some of the problems that must be addressed when planting C3 plants in hot, arid climates for ornamental purposes?
Explanation / Answer
1)
The proper order of cellular respiration is as follows:
5) Transport of glucose into cell
6) Glycolysis
1) Pyruvate oxidation
3) Citric Acid Cycle
4) Electron Transport
2) Chemiosmosis
2)
An anaerobic bacterium, which is absolutely grown in the absence of oxygen, is called strict anaerobe. An anaerobic bacterium, which has the flexible ability to grow in both oxygen rich and poor environments called Facultative anaerobe.
Hence, Facultative anaerobe can use both electron transport chain (ETC) and fermentation to produce energy, but not strict anaerobe. Some Facultative anaerobes can use nitrate as a final electron acceptor in ETC. They also produce gas (CO2) due to fermentation ability.
3)
Oxidative phosphorylation is the process of ATP production through electron transport chain. It is an aerobic metabolism and is brought by chemiosmosis mechanism. As shown in the process map, the process of oxidative phosphorylation involves the loss of electrons from NADH or FADH2.
Then they are carried by cytochromes through a series of transferases I-IV, releasing H+ ions (protons) in the process. When the protons re-enter the cell, they release the energy that allows ADP and phosphate to bind, producing ATP.
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