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Which series lists the correct order of steps of binary fission from first to last?
A. sex pilus connects two cells -- plasmid DNA is transferred -- complementary DNA strands are created -- cells separate
B. live cells bind to degraded cells -- DNA is transported across the membrane -- DNA is incorporated into the recipient's DNA
C. virus infects bacterial cell -- new viruses are made -- DNA is assembled in new virus -- new virus infects another bacterial cell and transfers DNA
D. DNA is copied -- DNA molecules attach to cell membrane -- cell membrane elongates and pinches off -- two identical cells are produced
A colony-forming unit or CFU, is the estimated number of visible colonies that are formed on an agar plate. It is a unit of measurement in microbiology that is used to estimate/count how concentrated the microorganisms in a sample test are. The number of CFU per sample can be calculated using the formula: (# of CFU x dilution factor)/(volume of the container or agar plate). An agar plate or test sample is viable if the CFU count is between 50-500.
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