BIOL 2011L Lecture Notes - Lecture 1: Chemical Potential, Advection, Transport Phenomena
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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. |