Compare and contrast the mechanism of action of a steroid and a protein-type hormone at the cellular
level. What will be an ideal response?
Steroid hormones are lipid soluble and therefore cross the plasma and nuclear membranes to combine
with nuclear receptors. This interaction results in the synthesis of new proteins.
Protein hormones combine with plasma membrane cell receptors and initiate a cascade of protein
activation that will produce an alteration of cell activity.
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Protein filaments with a diameter of 4-7 nm that play a role in cell movement and shape change are called
A. mycelia. B. microtubules. C. microfilaments. D. intermediate filaments.
Since the Industrial Revolution, the pH of the oceans has __________, making the water more
__________.
a. decreased; acidic b. decreased; basic c. increased; acidic d. increased; basic
Which group of cells makes antibodies?
a. Red blood cells b. B cells c. Platelets d. C cells e. T cells
Four of the five choices listed below are steps in
translation. Select the exception. a. initiation b. replication c. chain elongation d. termination e. ribosomal subunit binding