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5 Written questions

5 Matching questions

  1. Receptor tyrosine kinases
  2. Synaptic Signaling (local)
  3. What is the source of phophate in a phosphorylation cascade?
  4. cAMP usually direclty activates...?
  5. Paracrine Signaling (local)
  1. a A nerve cell releases neurotransmitter molecules into the synapse, stimulating the target cell
  2. b ATP
  3. c secreting cell acts on a nearby target cells by discharging molecules of a local regulator (a growth factor, etc.) into the extracellular fluid
  4. d plasma membrane receptors that are characterized by having enzymatic activity
  5. e protein kinase A

5 Multiple choice questions

  1. enzyme that transfers phospate groups from ATP to a protein (these include many of the relay molecules in signal transuction pathways)
  2. type of membrane receptor containing a region that can act as a "gate" when the receptor changes shape
    when the signaling molecule bindsas a ligand to the receptor protein, the gate opens or closes, allowing or blocking the flow of specific ions
  3. concentration of signaling molecules allowing bacteria to sense the local density of other bacterial cells
  4. small, non-protein, water soluble molecules or ions
    can readily spread throught the cell by diffusion
  5. transduction signal finally triggers some sort of response

5 True/False questions

  1. ligandenzyme that catalyzes the transfer of phosphate groups


  2. Plant Hormonesalso called plant growth regulators


  3. scaffolding proteins"controlled cell suicide" cells that are infected, damaged, or have reached the end of their functional life span


  4. transcription factorsBinding of the signaling molecule changes the receptor protein in some way, initating the conversion of a signal to a form to a form that can bring about a specific cellular response


  5. Receptiontransduction signal finally triggers some sort of response


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