In a normal heart, when the right ventricle contracts, it forces blood through the
A. tricuspid valve.
B. bicuspid valve.
C. aortic semilunar valve.
D. pulmonary semilunar valve.
Ans: D. pulmonary semilunar valve.
You might also like to view...
rRNA has an enzymatic role in all stages of protein synthesis
Indicate whether the statement is true or false.
Which of the following allows a virus to attach to a host cell?
a. A viral receptor must be present on the host cell. b. The cell must be in the process of apoptosis. c. The virus uses its tail fibers to cling to the cell. d. The cell must be already engaged in endocytosis.
Which mechanism of controlling gene expression occurs outside of the nucleus?
A) adding a cap and tail to RNA B) DNA packing/unpacking C) RNA splicing D) translation
The cell that produces interferon is protected from the infectious agent.
Indicate whether the statement is true or false.