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ch 27 (prokaryotics (they thrive in nearly everywhere which includes…
ch 27
prokaryotics
they thrive in nearly everywhere which includes places that are too acidic, hot, cold, or salty
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they can come in three different shapes: cocci (spheres), bacilli (rods), and spirals
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transformation a prokaryotic cell can take up and incorporate foriegn DNA from surrounding environment
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- phage infects bacterial donnor cell that carries A+ and B+ alleles
- phage DNA is replicated and phage protiens are synthesizes
- fragment of bacterial DNA with A+ allele is packages within a phage capsid
- incorporation of phage DNA creates recombinant cell with genotype A+B-
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rapid reproduction, mutation, and genetic combination contribute to genetic diversity
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cell-surface structure
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gram-positive bacteria have simple wals, large amount of peptideoglycan
gram-negative bacteria has less peptidoglycan, outer membrane has lipopolysaccharides
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