BIOL 220 Study Guide - Quiz Guide: Virophage, Freeze-Drying, Nitrogen Fixation
Study Guide
Exam 3 Objective
Describe ideal conditions for an aquatic organism to start Nitrogen fixation.
oLow on O2 levels and low NH4 levels
Explain why some structures in and on the cell are produced with less expensive amino acids
oFlagella is a red flag and once it is in the host it removes the flagella so there is no
reason to make it out of expensive amino acids when they can go towards something
more important
Why do we not consume vast amounts of microbes like bacteria as a primary food source
oFew bacteria are edible as isolated organisms because nucleic acid is often too
concentrated for food
Why do we ferment food
oPreserve
oFlavor
oDigestibility
Explain the difference between spoilage organism and a pathogen
oSpoilage organisms are often defined by their genetic capacity to cause disease
oPathogens possess highly specific mechanisms for host colonization
Explain some of the various ways to preserve or protect food
oRefrigeration
oFreezing
oPasteurization
oLypophilization
Freeze drying
Explain some structural and functional aspects of viruses
oCapsid packages the genome and delivers it into the host cell
What forms of life do viruses infect
oEVERYTHING
Explain what a virophage is
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