Transfer of random pieces of DNA mediated by phage is known as
A. transformation of competent cells.
B. generalized transduction.
C. conjugation.
D. transposition.
E. specialized transduction.
Answer: B
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On which of the following processes would a defective ribosome have the most detrimental effect?
A. translation B. replication C. transcription D. replication and transcription E. replication and translation
You had a cold last month and you caught another one this month from your daughter. Why could this
happen? a. Memory cells were not formed as a response to the first cold. b. The antibodies formed as a response to the first cold were degraded. c. The two cold viruses are significantly different. d. Your T cells are not working properly. e. Your antigen-presenting cells do not recognize the second cold virus.
Mycorrhizae are especially effective in helping plant roots uptake
A. phosphorus. B. potassium. C. iron. D. magnesium. E. nitrogen.
Which of the following describes a cytotoxic autoimmune reaction?
A) Antibodies react to cell-surface antigens. B) Antibodies are not made. C) Cells are killed. D) Immune complexes form. E) Mediate by T cells.