If red blood cells cultured in an isotonic medium are placed in distilled water, they will most likely:
A. become dormant
B. shrivel
C. remain unchanged
D. divide
E. swell and lyse
E. swell and lyse
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Gene regulation may entail
A. turning on genes only when needed. B. turning off genes when not needed. C. turning on or off entire groups of genes. D. All of the choices are correct.
During the elongation stage of transcription ____
a. DNA nucleotides are added to the transcript b. the transcript grows in the 5'®3' direction c. transcription factors recruit RNA polymerase to the template strand
d. the double helix remains single-stranded after being used as a template e. RNA polymerase binds to the promoter region
Which of the following choices places the steps of hemostasis in the correct sequence?
a. smooth muscle in the vessel wall contracts plasma proteins form a clot platelets stick together b. platelets stick together plasma proteins form a clot smooth muscle in the vessel wall contracts c. plasma proteins form a clot smooth muscle in the vessel wall contracts platelets stick together d. smooth muscle in the vessel wall contracts platelets stick together plasma proteins form a clot
The underlying problem in Gaucher disease is ____
a. the spontaneous breakdown of red blood cells b. the accumulation of fat in white blood cells c. the breakdown of the myelin sheath around nerves d. a hypertrophied spleen e. the lack of critical liver enzymes