Biology, Pages 334-346Neil Campbell and Jane Reece's BIOLOGY remains unsurpassed as the most successful majors biology textbook in the world. This text has invited more than 4 million students into the study of this dynamic and essential discipline. |
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Page 20
... ( Uninfected cells generally make no enzymes for carrying out this latter process . ) Figure 18.5 A simplified viral reproductive cycle . A virus is an obligate intracellular parasite that uses the equipment and small precursors of its 20.
... ( Uninfected cells generally make no enzymes for carrying out this latter process . ) Figure 18.5 A simplified viral reproductive cycle . A virus is an obligate intracellular parasite that uses the equipment and small precursors of its 20.
Page 26
... enzymes called restriction endonucleases , or simply restriction enzymes . The bacterial cell's own DNA is chemically modified in a way that prevents attack by restriction enzymes . But just as natural selection favors 26.
... enzymes called restriction endonucleases , or simply restriction enzymes . The bacterial cell's own DNA is chemically modified in a way that prevents attack by restriction enzymes . But just as natural selection favors 26.
Page 27
... enzymes , natural selection favors phage mutants that are resistant to these enzymes . Thus , the parasite - host relationship is in constant evolutionary flux . There is yet a third important reason bacteria have been spared from ...
... enzymes , natural selection favors phage mutants that are resistant to these enzymes . Thus , the parasite - host relationship is in constant evolutionary flux . There is yet a third important reason bacteria have been spared from ...
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animal viruses bacterial cell bacterial chromosome bacteriophage bacterium bind to specific capsid cause disease cellular enzymes circular coli cell Cycles of Phages DNA molecule double-stranded emerging viruses enter the host enveloped viruses eukaryotes existing viruses Figure genetic recombination glycoproteins herpesvirus host cell host range host species human disease immune system kill the host lysogenic cycle lytic cycle mechanisms membranous envelope microbes model systems mosaic virus TMV mRNA mutation natural selection favors nucleic acid obligate intracellular parasites particles phage DNA plant to plant plant viruses plasmids plasmodesmata polymerase prions prokaryotic prophage genes protein coat provirus restriction enzymes retrovirus reverse transcriptase RNA viruses Scientists simplest spread stranded RNA symptoms syndrome synthesis temperate phage template tobacco mosaic virus transcribed transposons type of virus vaccines vertical transmission viral diseases viral DNA viral envelope viral genome viral infection viral nucleic acid viral proteins viral reproductive cycle viroids virulent phage viruses and bacteria viruses cause