Cell-Cell Communication AP
4 years ago
alison_schaffer
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16 QuestionsShow answers
  • Question 1
    60 seconds
    Q. Which of the following would be an example of paracrine signaling in animals?
    answer choices
    neurotransmitter acetylcholine
    hormone epinephrine
    neurotransmitter norepinephrine
    growth factor
  • Question 2
    60 seconds
    Q. A signal molecule that binds to a plasma-membrane protein is a
    answer choices
    ligand
    second messenger
    protein kinase
    receptor protein
  • Question 3
    60 seconds
    Q. What is a G protein?
    answer choices
    specific type of membrane-receptor protein
    protein on the cytoplasmic side of a membrane
    membrane-bound enzyme
    relay protein
  • Question 4
    60 seconds
    Q. Which of the following can activate a protein by transferring a phosphate group to it?
    answer choices
    cAMP
    G Protein
    protein kinase
    protein phosphatase
  • Question 5
    60 seconds
    Q. What do second messengers do?
    answer choices
    transport a signal through the lipid bilayer
    relay a signal from the outside to the inside of the cell
    relay message from the inside of the mebrane throughout the cytoplasm
    dampen the message
  • Question 6
    60 seconds
    Q. What is a function of the second messenger IP3?
    answer choices
    bind to and activate protein kinase A
    activate transcription factors
    convert ATP to cAMP
    bind to and open ligand-gated channels
  • Question 7
    60 seconds
    Q. Which of the following is involved in many human medicines for disease?
    answer choices
    cAMP
    Calcium concentration
    G-protein pathways
    receptor tyrosine kinases
  • Question 8
    60 seconds
    Q. Signal amplification is most often achieved by
    answer choices
    an enzyme cascade
    binding of multiple signals
    branching pathways
    action of adenylyl cyclase
  • Question 9
    60 seconds
    Q. What does a protein kinase do?
    answer choices
    removes phosphates
    transfers phosphates from ATP to proteins
    activates an enzyme
  • Question 10
    60 seconds
    Q. What does a protein phosphatase do?
    answer choices
    removes phosphates
    transfers phosphates from ATP to proteins
    activates an enzyme with a signal molecule
  • Question 11
    60 seconds
    Q. What is a phosphorylation cascade?
    answer choices
    travelling of hormones through the air
    travelling of hormones through the blood
    the removal of a phosphate
    a series of molecules that get phosphorylated
  • Question 12
    60 seconds
    Q. What determines whether a cell is a target cell for a particular signal molecule?
    answer choices
    phosphorylation cascade
    cAMP
    signal receptors
    phosphatase
  • Question 13
    60 seconds
    Q. Do plant cells communicate using hormones?
    answer choices
    yes
    no
  • Question 14
    60 seconds
    Q. What determines whether a signal molecule binds on the surface or enters the cell?
    answer choices
    size
    polarity
    ability to cross the membrane
    all of these are correct
  • Question 15
    60 seconds
    Q. Which of the following converts cAMP to AMP?
    answer choices
    phosphodiesterase
    protein phosphatase
    GTPase
  • Question 16
    60 seconds
    Q. Which of the following is a chemical message that usually travels through the bloodstream to target cells?
    answer choices
    hormone
    local regulator
    endocrine cell
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