Which of the following is a characteristic NOT shared by bacterial and archaeal DNA?
A. They are circular molecules.
B. They are found in a nucleoid.
C. They have histones.
D. They are haploid.
E. They are linear molecules.
Answer: C
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Which of the following has a single strand of DNA shaped like a loop?
a. Plasmids b. Prokaryotes c. Eukaryotes d. Gametes
Which statement about an F factor is FALSE?
a. It is a DNA sequence. b. It is found in F+ cells. c. The F stands for fertility. d. It is involved with forming sex pili. e. It is found in recipient cells, not donor cells.
Which statement about germination is false?
A) The germination of a seed represents the beginning of life. B) Germination usually begins when a seed takes up water. C) A hydrated seed expands, rupturing its seed coat. D) Germination usually takes place after a period of dormancy.
Which of the following statements about eosinophil function is CORRECT?
A) They produce defensins. B) They secrete toxins onto virally infected cells. C) They are involved in the removal of neoplastic cells. D) They attach to the surface of parasitic helminths and produce toxins that kill the parasite. E) They identify and spare normal cells.