Which of the following enzymes are important in the deactivation of cAMP and termination of signaling?
A) phosphodiesterase
B) protein kinase
C) adenylate cyclase
D) G protein
A) phosphodiesterase
The increase in cAMP levels is usually short-lived because the enzyme phosphodiesterase is constantly present in the cytoplasm of the target cells.
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It is now possible for parents to bank the umbilical cord blood of their children; the cells in the cord would then be available for use later in the life of the child to treat a genetic disorder or cancer, should it develop
Indicate whether the statement is true or false
A normally functioning muscle cell is in which stage of its cycle?
A. G2 B. anaphase C. G0 D. cytokinesis
When the gene p53 initiates apoptosis, the cell's DNA causes the cell to
A. enter prophase. B. spontaneously break down the cell membrane. C. become differentiated. D. digest itself from the inside out.
Which of the following can be defined as small proteins that are secreted from virally infected cells to prevent the spread of the infection?
A) interferons B) macrophages C) immunoglobulins D) mast cells