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5 Written questions

5 Matching questions

  1. Biofilms
  2. Intracellular Receptors
  3. Synaptic Signaling (local)
  4. Hormonal Signaling (long-distance)
  5. kinase
  1. a enzyme that catalyzes the transfer of phosphate groups
  2. b Specialized endocrine cells secrete hormones into body fluids (often the blood)
  3. c 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)
  4. d A nerve cell releases neurotransmitter molecules into the synapse, stimulating the target cell
  5. e aggregations of bacteria that often form recognizable structures containing regions of specialized function

5 Multiple choice questions

  1. protein kinase A
  2. "controlled cell suicide" cells that are infected, damaged, or have reached the end of their functional life span
  3. a molecule that specificlly binds to another molecule, often a larger one
  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. transduction signal finally triggers some sort of response

5 True/False questions

  1. protein phosphatesenzymes that can rapidly remove phophate groups from proteins (a process called dephosphorylation)


  2. protein kinaseenzymes that can rapidly remove phophate groups from proteins (a process called dephosphorylation)


  3. ligand-gated ion channelalso called plant growth regulators


  4. second messengersconcentration of signaling molecules allowing bacteria to sense the local density of other bacterial cells


  5. scaffolding proteinslarge relay proteins to which other proteins are simultaneously attached


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