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5 Written questions

5 Matching questions

  1. Biofilms
  2. scaffolding proteins
  3. Intracellular Receptors
  4. ligand-gated ion channel
  5. Reception
  1. a large relay proteins to which other proteins are simultaneously attached
  2. b A chemical signal is detected when signaling molecule binds to a receptor protein located at the cell's surface or inside the cell
  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 aggregations of bacteria that often form recognizable structures containing regions of specialized function
  5. e 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

5 Multiple choice questions

  1. plasma membrane receptors that are characterized by having enzymatic activity
  2. a molecule that specificlly binds to another molecule, often a larger one
  3. enzyme that transfers phospate groups from ATP to a protein (these include many of the relay molecules in signal transuction pathways)
  4. small, non-protein, water soluble molecules or ions
    can readily spread throught the cell by diffusion
  5. plasma membrane receptor that works with the help of a G protein
    used by yeast mating factors, epinephrine, other hormones and neurotransmitters
    NOT enzymes
    G-protein is active when bound to a GTP

5 True/False questions

  1. TransuductionA chemical signal is detected when signaling molecule binds to a receptor protein located at the cell's surface or inside the cell

          

  2. ResponseA chemical signal is detected when signaling molecule binds to a receptor protein located at the cell's surface or inside the cell

          

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

          

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

          

  5. cAMP usually direclty activates...?large relay proteins to which other proteins are simultaneously attached