An E. coli cell lacking an F plasmid would be unable to participate in __________.
a. the production of a pilus
b. transformation
c. transduction
d. conjugation
e. transformation and transduction
Answer: a. the production of a pilus
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Which of the following glandular secretions involved in digestion would be most likely to be released initially as zymogens?
A. protein-digesting enzymes B. fat-solubilizing bile salts C. acid-neutralizing bicarbonate D. carbohydrate-digesting enzymes
After an active cytotoxic T cell binds to an ailing cell, it releases toxins that ____
a. poke holes in the cell and cause it to die b. bind to the cell and prevent it from harming other "self" cells c. attract macrophages to the cell d. attract antibodies directed at "self" cells e. stimulate inflammation
Which of the following will NOT develop into
one or more gametes? a. spermatogonium b. polar bodies c. primary oocyte d. spermatid e. secondary spermatocyte
Archaea have very diverse environmental requirements and tolerances. From what you have learned about them, which among the following conditions or substances do ALL archaeans require for survival and reproduction?
A. moderate salinity B. moderate pH C. moderate temperature D. oxygen E. carbon