Metabolic processes of energy transformation can be exergonic or endergonic. In order for the cell to perform endergonic reactions, they must be coupled to exergonic reactions. Explain why.
Metabolic processes of energy transformation can be exergonic or endergonic. In order for the cell to perform endergonic reactions, they must be coupled to exergonic reactions. Explain why.
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Related questions
1A.
A <---> B
You measure the amount of molecules A and B for the reversible reaction above at a particular time point and find more of molecule A than of B. Your colleague believes that the reaction is at equilibrium. Which of the following statements about this reaction is correct? (select all that apply)
| A | A --> B is exergonic |
| B | B --> A is exergonic |
| C | B --> A is endergonic |
| D | A --> B is endergonic |
| E | Your colleague must be wrong. If the reaction were at equilibrium, there must be equal amounts of molecule A and B. |
1B. Which of the following is/are true of energy and chemical gradients? (select all that apply)
| A | A concentration gradient represents a form of potential (stored) energy. |
| B | Movement of a molecule down a concentration gradient across a membrane releases energy that can be used to do work. |
| C | If a molecules cross a membrane at equal rates in both directions (is at equilibrium) this movement is neither exergonic or endergonic. |
| D | Moving molecules against a concentration gradient is an endergonic process. |
40. When a protein is synthesized within the cell, this process represents a chemical reaction that is:
| explosive | ||
| exergonic and anabolic | ||
| exergonic and catabolic | ||
| endergonic and anabolic | ||
| endergonic and catabolic |
39. Chemical bonds in carbohydrates (i.e., glucose) and fats, have:
| no potential or kinetic energy | ||
| large amount of kinetic energy | ||
| large amount of potential energy | ||
| small amount of potential energy | ||
| small amount of kinetic energy |
38. When Na+ moves into the cell following the openning of Na+ channels, _____________________________.
| the ion charge across the membrane in the area that Na+ moves in will change. | ||
| voltage-gated channels will close. | ||
| an action potential will be observed. | ||
| the cell will hyperpolarize. | ||
| same amount of K+ ions will move out of the cell to counteract the Na+ moving into the cell. |
