Multiple Choice
Which of the following are ways in which binding of a chemical messenger with a cell's receptor can bring about a cellular response?
A) Opening or closing of specific ionic channels in the plasma membrane
B) Activation of an intracellular second-messenger system
C) Promoting or inhibiting the transcription of genes that code for the synthesis of cellular proteins
D) Activating or inhibiting intracellular enzymes
E) All of the choices are correct.
Correct Answer:
Verified
Correct Answer:
Verified
Q26: Second messengers<br>A)are necessary for all receptor signal
Q27: First messengers may bind to a membrane
Q28: The enzyme that catalyzes the production of
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Q30: Cyclic AMP activates allosteric proteins.
Q32: Which of the following statements is TRUE?<br>A)Phosphorylation
Q33: Competition for receptors is strictly a pharmacological
Q34: Which of the following is known to
Q35: The process whereby repeated exposure to a
Q36: Two cell types having the same type