The link between macrophages and neutrophils is that both cells
A. Have large granules in the cytoplasm
B. Are phagocytes
C. Have a life span of about 10 years
D. Lack a nucleus
E. recognize tumor and virus infected cells and kill them
Answer: B. Are phagocytes
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Assume that a bacterial cell produces a Lac repressor that is able to bind to the operator sequence of the lac operon but
cannot bind allolactose. Explain the effect on transcription of the lac operon is the presence and absence of lactose.
What will be an ideal response?Exocrine glands secrete all of the following EXCEPT ____
a. mucus b. hormones c. earwax d. milk e. digestive enzymes
Originating from a source outside of the body
What will be an ideal response?
Which of the following statements about IL-12 is FALSE?
A) It activates macrophages. B) It inhibits some tumor cells. C) It activates the TH1 pathway. D) It causes autoimmune diseases. E) It causes TH cells to respond to HIV.