Archive for the ‘Biology’ Category
August 7th, 2010 | 
Author: 
I have a bunch of questions I have answered. Just want to make sure everything is correct. If I have made an error please note which question number and what you feel the correct answer should be. Thanks!
1. Chemical reactions that will occur only if there is an addition of energy are said to be:
Answered- endergonic
2. A metabolic reaction that has two parts- one reaction that releases energy and one reaction that requires energy to be completed is said to be a(an):
Answered: coupled reaction
3. The metabolism (breakdown) of ________ in the mitochondria provides the energy for the resphosphorylation of ADP.
Answered: glucose
4. ATP contains: Answered: adenine, ribose, and three phosphates
5. Facilitated diffusion is not used for ATP by the body’s cells. Answered: True
6. Most enzymes are: Answered: protein molecules
7. Most of the body’s cells use a great amount of ATP daily Answered: but lare amounts of ATP are not stored by the body because we contantly re-generate ATP from ADP + phosphate
8. If A>>B>>C>>D>>E>>F represents a metabolic pathway, then the letter F would represent?
Answered: End product
9. Which of the following is NOT true about enzymes?
Answered: They provide the energy for many cellular reactions.
10. The combination of an enzyme and the substance it will act upon (catalyze) is called the:
Answered: active site
11. Which of the following is ot an enzyme?
Answered: maltose
12. What occurs when electrons are lost during a chemical reaction?
Answered oxidation
13. What are the end products of aerobic cellular respiration?
Answered: carbon dioxide and water
14. What are the reactants in the overall equation for aerobic cellular respiration?
Answered: oxygen and glucose
15. Glycolysis occurs? Answered: in the matrix of the mitochonria
16. The final acceptor fore hydrogen ions in aerobic cellular respiration is?
Answered: oxygen
17. Most of the ATP of aerobic cellular respiration is produced by?
Answered: the electron transport system
18. Our muscles will undergo fermentation and produce lactic acid when:
Answered: No oxygen is available
19. Which process occurs in the cristae of the mitochondra?
Answered: electron transport system
20. Another term for an exergonic reaction is:
Answered: catabolic
True/False
21. Enzymes catalyze chemical reactions-but are not changed in the process
Answered: true
22. When an organized system experiences entrophy- it will become less organized- and ultimately less stable.
Answered: true
23. ATP is necessary to accomplish the chemical work of protein synthesis.
Answered: true
24. An oxygen debt accumulates when lactic acid builds up in the muscles during strenuous exercise.
Answered: true
25. Fermentation is an aerobic process. Answered: false
26. Decreasing the activation energy of a particular reaction means that it will require more energy to complete that reaction. Answered: false
27. Even if enzymes denature- they can still act as catalysts. Answered: false
28. Reduction reactions are defined as rections where electrons are gained by the system. Answered: true
29. In the process of cellular respiration, glucose is oxidized and oxygen is reduced. Answered true
30. Most enzymes funtion best at a pH of about 7. Answered: true
31. The “stored” energy in a molecule like glucose: answered- ATP
32 Referred to as the energy of motion: answered: kinetic energy
33. Energy can neither be created nor destroyed: answered: 1st law of thermodynamics
34. Organized systems tend to disorganize and lose energy over time: answered: 2nd law of therm
35. The energy “currency” of all cells: answered: Potential energy
36. Glucose actually splits into two 3-carbon molecules of PGAL answered: Glycolysis
37. Produces lactic acid in animal cells and alcohol and carbon dioxide in certain bacterial cells.
Answered: Fermentation
38. Receives 2 molecules of Acetyl CoA and releases 4 molecules of carbon dioxide and 2 ATP’s
Answered: Krebs Cycle
39. Pyruvic acid is converted ton Acetyl CoA and moves into the mitochondria
Answered: Transition Reaction
40. Carrier molecules move electrons from high energy to low energy levels in this process
Answered: Electron Transport System
I reversed #31 and #35 answers
Trinidad Seamen
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Louie Doutt
All of the statements concerning cellular respiration are true EXCEPT:
In the Krebs cycle, two molecules of carbon dioxide and one molecule of FADH2 are produced for each acetyl CoA that enters the cycle.
The metabolic breakdown of glucose yields more energy during fermentation than during aerobic respiration.
The conversion of glucose to pyruvate can occur in the absence of oxygen.
When aerobes respire anaerobically, they may build up an oxygen debt that may be paid eventually with the intake of oxygen.
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2. Which cellular process is represented by the following: Carbon dioxide + water + sunlight food + oxygen gas?
osmosis
oxygenation
cellular respiration
photosynthesis
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3. NADP is an electron donor during photosynthesis.
True
False
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4. During the general process of photosynthesis, the energy from light is used to accomplish which process?
the reduction of carbon dioxide
the oxidation of water
the reduction of oxygen
the oxidation of carbohydrates
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Florinda Godfrey