A major function of natural killer cells is to ________
A) attack and kill pathogenic microorganisms
B) attack virus-infected cells
C) tag pathogenic microorganisms with antibodies
D) phagocytize microorganisms that have been tagged with antibodies
B
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The endomembrane system is involved in each of the following functions EXCEPT ____
a. DNA synthesis b. synthesis of proteins c. synthesis of lipids d. transport of proteins to outside the cell e. detoxification of some toxins
Which of the following protists causes a sexually transmitted disease that can result in infertility?
a. Trichomonas vaginalis b. Trypanosoma cruzi c. Giardia lamblia d. Euglena gracilis
In thinking about their role in cell division, oncogenes are like the ________ of a car, while tumor-suppressor genes are like the ________ of a car
A) gas pedal; brakes B) steering wheel; brakes C) gas pedal; headlights D) brakes; gas pedal
Genes for drug resistance may be present
A. on plasmids. B. on the chromosome. C. on mitochondrial DNA. D. both on the chromosome and on plasmids. E. both on plasmids and on mitochondrial DNA. F. both on the chromosome and on mitochindrial DNA.