Which of the following is NOT part of the general response of cells during cellular communication?
A. The cell automatically returns to its normal
activities after the signal has exerted its
effect.
B. A receptor on the outside of the cell binds
to a specific signal molecule that it is
designed to capture.
C. A cell-surface receptor molecule becomes
activated by binding to its molecular signal.
D. An activated cell-surface receptor transfers
the signal to the interior of the cell.
E. The signal is carried and amplified inside
the cell by binding to a series of specific
proteins, affecting cellular activities according
to the type of signal involved.
A
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a. myocardium b. pulmonary veins c. inferior vena cava d. right atrium e. heart apex
Which of the following is NOT needed for transcription?
A. enzymes B. DNA C. RNA nucleotides D. ribosomes
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A) meiosis B) cloning C) cytokinesis D) mitosis
A protein's shape and chemical behavior are determined by ________
A) the cell's age B) the environment of an organism C) its linear sequence of amino acids D) the type of cell in which it resides E) the cholesterol makeup of the lipid membrane