Biochemistry revision: Signalling

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1. The similarity in structure of G proteins across a diverse selection of organisms suggests

  • G proteins evolved very early
  • G proteins were in bacteria, that were eaten by eukaryotes
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Other questions in this quiz

2. ________ is the detection of a signalling molecule coming from outside the cell, this occurs when the molecule binds to the receptor protein on the cell surface membrane

  • Response
  • Reception
  • Transduction

3. Ligand gated iron channels contain a region that acts as a gate, when a ligand binds, the gate opens or closes

  • True
  • False

4. A secreting cell acts on nearby target cells by discharging molecules of a local regulator into the extracellular fluid

  • Synaptic signalling
  • Paracrine (local)
  • Endocrine signalling (long distance)

5. Generally, there are __ stages of cell signalling

  • 3
  • 30


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