Figure 18.1 Comparing the size of a virus, a bacterium, and a eukaryotic cell

Figure 18.2 Viral structure

Figure 18.4 The lytic cycle of phage T4

Table 18.1 Classes of Animal Viruses, Grouped by Type of Nucleic Acid

Figure 18.6 The reproductive cycle of an enveloped virus

Figure 18.7 HIV, a retrovirus

Figure 18.10 A hypothesis to explain how prions propagate

Figure 18.11 Replication of the bacterial chromosome

Figure 18.12 Detecting genetic recombination in bacteria

Figure 18.13 Transduction (Layer 4)

Figure 18.15 Conjugation and recombination in E. coli (Layer 4)

Figure 18.16 Insertion sequences, the simplest transposons

Figure 18.17 Insertion of a transposon and creation of direct repeats

Figure 18.18 Anatomy of a composite transposon

Figure 18.19 Regulation of a metabolic pathway

Figure 18.21a The lac operon: regulated synthesis of inducible enzymes

Figure 18.21b The lac operon: regulated synthesis of inducible enzymes

Figure 18.22a Positive control: cAMP receptor protein

Unnumbered Figure (page 353) Bacterial and viral growth curves