Microbiology 250 Exam 1 Questions with Complete
Solutions. Verified for New updates
Microbiology - -✓study of microbes
List groups of organisms studied in microbiology: - -✓bacteria, fungus, algae/protists, viruses, helminthes
Differences between Prokaryotic and Eukaryotic cells: - -✓Prokaryotic
-no nucleus
-no membrane bound organelles
Eukaryotic
-true nucleus
-has membrane bound organelles
Animalae - -✓are not green, move
Evolution of microbial life on earth: - -✓No oxygen in early earthly era, bacteria have been around as
dominant life forms for a long time (3.5 billion years ago), Endosymbiosis
cytoplasm - -✓contains ribosomes, DNA - mixture of water, nutrients, proteins
nucleoid - -✓acts as nucleus - contains DNA, RNA, proteins
inclusion bodies - -✓granules for storage of extra carbon, nitrogen, phosphorus - energy sources
endospores - -✓DNA surrounded by proteins that protects central core of bacteria, protects bacteria:
resistant to heat, dessication, and chemicals
cytoskeleton - -✓protein filaments assist with cell growth and division - binary fission
plasma membrane - -✓phospholipid bilayer with polar heads and hydrophilic tails
facilitated diffusion - -✓protein helps move molecules from higher concentration to lower concentration
simple diffusion - -✓moves molecules from higher concentration to lower concentration naturally, no
energy
osmosis - -✓movement of water from high concentration to low concentration
plantae - -✓do not move, green
protists - -✓everything that does not fit into animalae and plantae
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