An antigen is any substance that triggers an immune response

a. true
b. false


Answer: a. true

Biology & Microbiology

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An antibiotic is added to a culture of E. coli, resulting in death of the cells. Bacteriophage are then added. Would the phage replicate in the E. coli cells? Why or why not?

A. Yes, because the machinery inside the cells is most likely still active, even though the cells are no longer living. The virus could use that machinery to replicate new virus particles. B. No, because the virus would depend too much on having the active machinery of a living cell for its replication. Without the ability of the cell to try to replace what is lost/damaged/used as the virus goes through its life cycle, the virus couldn't reproduce effectively. C. Yes, because viruses are capable of reanimating dead cells to force them to produce more virus particles. D. No, because entry of the virus into the target cell is dependent on the cell being alive to conduct endocytosis of the virus.

Biology & Microbiology

The cells that actually secrete antibodies are

A. plasma cells. B. natural killer cells. C. phagocytes. D. T cells.

Biology & Microbiology

Of the following, which is probably the most common route for membrane flow in the endomembrane system?

a. Golgi lysosome ER plasma membrane b. tonoplast plasma membrane nuclear envelope smooth ER c. nuclear envelope lysosome Golgi plasma membrane d. rough ER vesicles Golgi plasma membrane e. ER chloroplasts mitochondrion cell membrane

Biology & Microbiology

A scientist wants to manipulate glucose levels in amphibians to determine freeze tolerance at -5 Celsius. Which arena would suit this question best?

A) Laboratory experiment B) Field experiment C) Field surveys D) Observation in the wild

Biology & Microbiology