immune+system+review

Write the question and your answer p. 141 #1, 2, 3, 4, 7, 8, 9, 10, 11, 12, 13, 14, 16

Describe the basic charactersitics of bacteria. Explain how five particular features contribute to the ability of bacteria to cause disease. Bacteria are single celled prokaryotes and they dont have a nucleus. capsule - allow bacteria to be sticky and stick on teeth frimbriae - stiff fibers that allow bacteria to adhere to surfaces such as host cells pilus is an elongated hollow appendage used to transfer dna from one cell to another plasmids - genes that allow bacteria to be resistant to antibiotics are often located in a plasmid toxins - molecules that inhibit cellular metabolism What is the structure of a virus? is a virus living explain how a virus is able to reproduce Viruses bridge the gap between living and the nonliving and have to replicate in cells. virus has two parts an outer capsid and an inner core of nucleic acid What are some ways that can explain the emegernce of new viral diseases