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Paracrine messenger molecules are usually ________________(a) large(b) stable(c) unstable(d) amphotericThis question was addressed to me in a job interview.My question is from Cell Signaling Systems in chapter Cell Signaling and Signal Transduction of Cell Biology

Answer» CORRECT choice is (c) unstable

Easiest explanation: Paracrine messenger molecules are unstable and cannot travel long distances in the BODY mostly because they are EITHER degraded by the ENZYMES or they bind to the extracellular matrix.


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