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5 Written questions

5 Matching questions

  1. quorum sensing
  2. cAMP usually direclty activates...?
  3. kinase
  4. Plant Hormones
  5. Synaptic Signaling (local)
  1. a protein kinase A
  2. b enzyme that catalyzes the transfer of phosphate groups
  3. c concentration of signaling molecules allowing bacteria to sense the local density of other bacterial cells
  4. d also called plant growth regulators
  5. e A nerve cell releases neurotransmitter molecules into the synapse, stimulating the target cell

5 Multiple choice questions

  1. found in either the cytoplasm or in the nucleus of target cells
    chemical signaling messengers must pass through the membrane to reach this receptor, so the chemical messengers are either hydrophobic, or small enough to cross the membrane (ex. steroid and thyroid hormones in animals)
  2. transduction signal finally triggers some sort of response
  3. control which genes are turned on (which gense are transcribed to mRNA) ex. testosterone
  4. Binding 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. A chemical signal is detected when signaling molecule binds to a receptor protein located at the cell's surface or inside the cell

5 True/False questions

  1. What is the source of phophate in a phosphorylation cascade?ATP


  2. Biofilmsaggregations of bacteria that often form recognizable structures containing regions of specialized function


  3. ligand-gated ion channelalso called plant growth regulators


  4. Paracrine Signaling (local)secreting cell acts on a nearby target cells by discharging molecules of a local regulator (a growth factor, etc.) into the extracellular fluid


  5. Hormonal Signaling (long-distance)Specialized endocrine cells secrete hormones into body fluids (often the blood)