OPENSTAX MICROBIOLOGY EXAM SCRIPT SOLVED QUESTIONS AND CORRECT ANSWERS GRADED A+

OPENSTAX MICROBIOLOGY EXAM SCRIPT
SOLVED QUESTIONS AND CORRECT
ANSWERS GRADED A+


◉ Where are prokaryotes found? Answer: Everywhere, air, ground,
water, human body


◉ carbon fixation Answer: Prokaryotes concert CO2 into organic
carbon products


◉ nitrogen fixation Answer: Conversion of atmospheric nitrogen into
ammonia for survival of plants


◉ Prokaryotes clean up Answer: Degrade toxic chemicals


◉ How many are pathogen? Answer: Less than 1%


◉ How can bacteria contaminate food Answer: Food spoilage and
food borne illness


◉ Prokaryote characteristics Answer: Unicellular lack membrane
bound nucleus and organelles

, ◉ microbial ecology Answer: Study interactions btwn populations


◉ Cooperative Interactions Answer: Benefit the populations


◉ Competitive interactions Answer: one population competes with
another for resources


◉ Mutualism Answer: Both benefit


◉ Amensalism Answer: One harmed and other not affected


◉ Commensalism Answer: One benefits and other not affected


◉ Neutralism Answer: Neither affected


◉ Parasitism Answer: One benefits and other negatively affected


◉ resident microbiota Answer: On human body, important for human
health


◉ transient microbiota Answer: Temporarily on human body
(pathogens)


◉ Gram-negative bacteria Answer: Proteobacteria and non-
proteobacteria