Microbiology with Diseases by Taxonomy exam questions and answers fully solved
Microbial Growth - Answers-Increase in a population of microbes
-due to reproduction of individual microbes
Results of microbial Growth - Answers-a colony
-a biofilm
Colony of cells - Answers-a large group of cells generated from a single one
Biofilm - Answerscollection of microbes living on a surface in a complex colony
Most common microbial nutrients by element - AnswersCarbon, oxygen, nitrogen and
hydrogen, obtained from a variety of sources
Two groups of organisms based on a source of carbon - Answersautotrophs and heterotrophs
two groups of organisms based on a source of energy - Answerschemotrophs and phototrophs
Chemotrophs - AnswersOrganisms that develop energy from chemical means
phototrophs - Answersorganisms that develop energy from light
Autotrophs - AnswersUtilize carbon dioxide in air
Heterotrophs - AnswersUtilize organic molecules in food
green and sulfur bacteria oxygen production - Answersuses H2S as an electron source, they do
NOT produce oxygen
Growth requiring nutrients - Answerssources of carbon energy and electrons
Two groups of organisms based on sources of electrons - Answersorganotrophs, lithotrophs
Organotrophs - Answersorganic molecules as electron source
lithotrophs - Answersinorganic molecules as electron source
Oxygen requirements - Answersoxygen is essential for obligate aerobes, while being deadly for
obligate anaerobes
Why can oxygen be deadly? - AnswersToxic forms of oxygen are highly reactive and excellent
oxidizing agents, resulting oxidation causing irreparable damage to cells
Forms of toxic oxygen - Answerssinglet, superoxide radicals, peroxide anion, hydroxyl radical
Microbial Growth - Answers-Increase in a population of microbes
-due to reproduction of individual microbes
Results of microbial Growth - Answers-a colony
-a biofilm
Colony of cells - Answers-a large group of cells generated from a single one
Biofilm - Answerscollection of microbes living on a surface in a complex colony
Most common microbial nutrients by element - AnswersCarbon, oxygen, nitrogen and
hydrogen, obtained from a variety of sources
Two groups of organisms based on a source of carbon - Answersautotrophs and heterotrophs
two groups of organisms based on a source of energy - Answerschemotrophs and phototrophs
Chemotrophs - AnswersOrganisms that develop energy from chemical means
phototrophs - Answersorganisms that develop energy from light
Autotrophs - AnswersUtilize carbon dioxide in air
Heterotrophs - AnswersUtilize organic molecules in food
green and sulfur bacteria oxygen production - Answersuses H2S as an electron source, they do
NOT produce oxygen
Growth requiring nutrients - Answerssources of carbon energy and electrons
Two groups of organisms based on sources of electrons - Answersorganotrophs, lithotrophs
Organotrophs - Answersorganic molecules as electron source
lithotrophs - Answersinorganic molecules as electron source
Oxygen requirements - Answersoxygen is essential for obligate aerobes, while being deadly for
obligate anaerobes
Why can oxygen be deadly? - AnswersToxic forms of oxygen are highly reactive and excellent
oxidizing agents, resulting oxidation causing irreparable damage to cells
Forms of toxic oxygen - Answerssinglet, superoxide radicals, peroxide anion, hydroxyl radical
