Which term best describes the movement of NH4+ ions into a cell down an electrochemical gradient?
a. a symport
b. passive diffusion
c. facilitated diffusion
d. active transport
Ans: c. facilitated diffusion
Biology & Microbiology
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Coxiella burnetii reproduces in the ________ of a eukaryotic host cell.
A. nucleus B. phagolysosome C. cytoplasm D. endoplasmic reticulum
Biology & Microbiology
Which of the following is NOT involved in nonspecific defenses?
A. natural killer cells B. monocytes C. neutrophils D. mast cells E. B cells
Biology & Microbiology
The causative agent of plague is
A. Vibrio cholerae. B. Staphylococcus aureus. C. Brucella abortus. D. Yersinia pestis.
Biology & Microbiology
Explain the difference between benign and malignant tumors
What will be an ideal response?
Biology & Microbiology