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 8
... so small that they passed through the filter or made a filterable toxin that caused the disease . This latter possibility was ruled out when the Dutch botanist Martinus Beijerinck discovered that the infectious agent in the filtered sap 8.
... so small that they passed through the filter or made a filterable toxin that caused the disease . This latter possibility was ruled out when the Dutch botanist Martinus Beijerinck discovered that the infectious agent in the filtered sap 8.
Page 9
... Unlike bacteria , the mysterious agent of mosaic disease could not be cultivated on nutrient media in test tubes or petri dishes . Beijerinck imagined a reproducing particle much smaller and simpler than bacteria . His 9.
... Unlike bacteria , the mysterious agent of mosaic disease could not be cultivated on nutrient media in test tubes or petri dishes . Beijerinck imagined a reproducing particle much smaller and simpler than bacteria . His 9.
Page 68
... agent that spreads a disease . But viroids are nucleic acid , whose ability to be replicated is well known . Even more surprising is the evidence for infectious proteins , called prions , which appear to cause a number of degenerative ...
... agent that spreads a disease . But viroids are nucleic acid , whose ability to be replicated is well known . Even more surprising is the evidence for infectious proteins , called prions , which appear to cause a number of degenerative ...
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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