Which of the processes named here is the least likely to contribute to the evolution of genetic diversity of bacteria and archaea?
A. Mutation
B. Binary fission
C. Horizontal gene transfer
D. Sexual reproduction
Answer: D
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Microbes are involved in which step(s) of wastewater treatment?
A) primary only B) secondary and tertiary C) secondary only D) primary and secondary
Adenoviruses are responsible for causing diseases such as keratoconjunctivitis, pneumonia, hemorrhagic cystitis, and gastroenteritis in children. Transmission is usually via:
a. contact with rodent urine. b. respiratory secretions. c. arthropod vector. d. sexual contact.
Suppose that the first part of a new polypeptide chain being produced in a eukaryotic cell does not
have a signal peptide. Which of the following would you associate with the location of translation to form that polypeptide?
a. cytoplasm only b. first cytoplasm, then rough ER c. Golgi apparatus only d. first rough ER, then Golgi apparatus e. rough ER only
Which characteristic is typical of a cancer cell but not of a normal cell?
A) Cell division is inhibited when the cell contacts neighboring cells. B) The cell cycle lacks S phase. C) The cell has the ability to invade surrounding tissue. D) Cell death occurs after a limited number of divisions.