In striated muscle contraction, the Ca2+-ATPase pump
A) releases Ca2+ from the T tubule.
B) secretes Ca2+ from the axon terminal.
C) is voltage-gated.
D) decreases Ca2+ in the sarcoplasm.
E) increases Ca2+ binding to TnC.
Answer: D
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The red blood cells of people with sickle cell anemia have abnormal shapes due to ____
a. hemoglobin molecules with mutant beta globin subunits sticking together and forming long fibers in the cytoplasm b. destruction of the hemoglobin molecules c. loss of hemoglobin through leaky cell membranes d. the attachment of phosphate groups to the hemoglobin molecules e. the binding of methyl groups to the heme group of the hemoglobin molecule causing desiccation of the cells
Which of the following statements is
INCORRECT?
a. Viruses are not able to move by themselves. b. Viruses are not able to reproduce by themselves. c. Viruses are not structurally organized. d. Viruses are nonliving particles. e. Viruses contain instructions to manufacture themselves
The "poles" of a cell are its
a. centrosomes. b. centromeres. c. autosomes. d. centrioles. e. automeres.
What non-medical uses of genetic testing have proliferated?
a. Sealing the paternity of parents to there children. b. Freeing wrongfully convicted individuals. c. Securing convictions in decades old “cold” cases. d. All of the above.