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BHCC Microbiology Exam 1 Study Questions and Answers
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BHCC Microbiology Exam 1 Study Questions and Answers List four ways microbes are used in our everyday life (be specific). - ANSWER-1. They are in the ater of oceans and lakes which are lived in by mammals such as whales and fish which are important parts of the food chain. 2. They are in the s...

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  • October 30, 2024
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FIRST PUBLISH OCTOBER 2024




BHCC Microbiology Exam 1 Study

Questions and Answers


List four ways microbes are used in our everyday life (be specific). - ANSWER✔✔-1. They are in the ater

of oceans and lakes which are lived in by mammals such as whales and fish which are important parts of

the food chain.


2. They are in the soil and microbes can help recycle chemical elements in the soil


3. Photosynthesis - microbes help with this and some of their metabolisms depend on photosynthesis


4. Microbes are in our intestines and other animals and help with our digestion as well as synthesis of

Vitamins B and K


5. Commercial applications - microbes are used in processed foods such as yogurt, cheese, and wine.


What is the difference between microbial genetics and molecular biology? - ANSWER✔✔-Microbial

genetics is the study of the science of heredity and the genetic information in the cells of microbes.

Molecular biology is the branch of biology that deals with the structure and function of the

macromolecules (e.g., proteins and nucleic acids) essential to life, so it encompasses microbial genetics

somewhat but also includes all the other aspects of cells and microbes.



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In the Book: Microbial genetics are the mechanisms by which microorganisms inherit traits while

Molecular biology studies how genetic information is carried in molecules of DNA


Give two reasons why it took so long to disprove the theory of spontaneous generation? - ANSWER✔✔-

Spontaneous generation is the idea that organisms can arise from nonliving organisms, unlike the maxim

that cells must come from other cells (biogenesis). It took so long to disprove spontaneous generation

because microbes are present in air and on surfaces and so in old experiments it could seem like they

generated from nothing. Additionally, disbelievers in biogenesis could point out that lack of "fresh air" or

some other nonliving component was necessary for the creation of life from non-life when scientists (like

Francesco Redi) showed that organisms wouldn't form in covered containers. 1 reason is that the lack of

scientific technology (like high powered microscopes) made it difficult to make the connection between

something like flies landing on a corpse and the successive development of maggots. 2. Additionally John

Needham found that even after he heated nutrient fluids (to kill microbes) and poured them into

covered flasks, when they cooled, they still had microorganisms and so he believed the microorganisms

generated spontaneously. This went back and forth and with no internet it basically took forever for

someone to definitively disprove it.


4. In the name Eschetichia coli, what is the genus? What is the species? - ANSWER✔✔-Eschetichia is the

genus and coli is the species.


5. Classification of microbes is based on the ________________ organization of the organisms. -

ANSWER✔✔-cellular
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_____unicellular eukaryotes; move by cilia, flagella, pseudopods - ANSWER✔✔-protozoa


_____core containing DNA or RNA; acellular - ANSWER✔✔-viruses


_____cell wall of peptidoglycan - ANSWER✔✔-bacteria


_____eukaryotes with cell wall of chitin; most visible part is mycelia - ANSWER✔✔-fungi


_____photosynthetic eukaryotes - ANSWER✔✔-algae


7. Rank the size of the following from smallest to largest:


a. Virus


b. Skin cell


c. E.coli cell


d. Yeast cell - ANSWER✔✔-1. virus


2. E. coli


3. Yeast cell


4. Skin cell


8. Name the three eukaryotic groups in the microbial world. - ANSWER✔✔-1. protozoa



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