Indicate the cell types that are most likely involved in tissue rejection.
A. Cytotoxic T cells
B. Macrophages
C. T helper cells
D. B cells
E. Neutrophils
Answer: C
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Formation of a pseudomembrane in the back of the throat is seen in cases of ________.
A. SARS B. tuberculosis C. diphtheria D. pharyngitis E. pertussis
After a protein coding gene is identified, its function can be studied by using RNA interference to
activate the gene.
Molecular biologists rely on many, often sophisticated, techniques to pursue their discipline. Ultracentrifugation, electron microscopy, X-ray diffraction, electrophoresis, and computer interfacing are fundamental tools
Model organisms provide the raw materials for study. List three organisms (or organismic groups) often used by recombinant DNA technologists and describe a major advantage of each group.
Urinary catheters pose risks of causing urinary tract infections because
A) they can introduce bacteria from the skin, anal, or external genital areas into the bladder. B) they provide a surface for bacterial biofilms to establish and they can introduce bacteria from the skin, anal, or external genital areas into the bladder. C) they provide a surface for bacterial biofilms to establish. D) they block urine flow out of the bladder. E) they block urine flow out of the bladder and they can introduce bacteria from the skin, anal, or external genital areas into the bladder.