Plasmid cloning vector DNA is usually introduced into bacterial hosts by
A. ligation.
B. transformation.
C. plasmolysis.
D. transduction.
Answer: B
Biology & Microbiology
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Specific cells in developing seeds and maturing fruits have receptors for ethylene, but cells in stems
generally do not.
Indicate whether the statement is true or false.
Biology & Microbiology
When a cell releases chemicals that act as signals into the extracellular fluid to affect cells, this is an
example of
a. autocrine regulation. b. endocrine regulation. c. paracrine regulation. d. systemic regulation. e. exocrine regulation.
Biology & Microbiology
When microbes live independently but cooperate and share nutrients, it is called ________.
A. mutualism B. antibiosis C. synergism D. symbiosis
Biology & Microbiology
Group A streptococci are considered more virulent if their cytoplasmic membrane contains M protein.
Answer the following statement true (T) or false (F)
Biology & Microbiology