BSC 1005 Lecture Notes - Lecture 20: Avian Influenza, Genital Herpes, Cervical Cancer
Document Summary
Bacteriophage, viroids, prions, microorganisms, prokaryotes, archaea, eubacteria, endospore, Viruses are smaller than bacteria, attack every known living organism. Protein coat, nucleic acid core (genetic material) Virus cannot reproduce itself without host cells (host-specific) Adenovirus main cause of common cold. Bacteriophage (contains dna): a group of viruses that infect bacterial cells. Viral multiplication cycles: attachment, penetration, replication and synthesis, assembly, release. Lytic pathway leads to the death of the host cell. Lysogenic pathway virus does not kill the host cell; viral dna is incorporated in to the host dna. Cold, certain cancers (hpv (human papilloma virus) cervical cancer), wart, Single-celled organisms that are too small to be seen without a microscope. Viruses are smaller but are not alive. Bacteria are very minute, measured in micrometers. Ribosomes in cytoplasm some may have semi-rigid cell wall. Plasmid small circle of extra dna with only few genes and self-replicating.
