Two intracellular molecules, X and Y, are both normally synthesized at a constant rate of 1000 molecules

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Two intracellular molecules, X and Y, are both normally synthesized at a constant rate of 1000 molecules per second per cell. Molecule X is broken down slowly: each molecule of X survives on average for 100 seconds. Molecule Y is broken down 10 times faster: each molecule of Y survives on average for 10 seconds.

A. Calculate how many molecules of X and Y the cell contains at any time.

B. If the rates of synthesis of both X and Y are suddenly increased tenfold to 10,000 molecules per second per cell without any change in their degradation rates how many molecules of X and Y will there be after one second?

C. Which molecule would be preferred for rapid signaling?

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Essential Cell Biology

ISBN: 9780393680362

5th Edition

Authors: Bruce Alberts, Karen Hopkin, Alexander Johnson, David Morgan, Martin Raff, Keith Roberts, Peter Walter

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