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MCB3020 Exam 1 Part 1 with Complete Solutions
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MCB3020 Exam 1 Part 1 with Complete SolutionsMCB3020 Exam 1 Part 1 with Complete SolutionsMCB3020 Exam 1 Part 1 with Complete SolutionsMCB3020 Exam 1 Part 1 with Complete Solutions What is the role of microbes in maintain temperature on earth? (Role of microbes in CO2 and CH4 recycling) - ANSWER -...

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  • August 13, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
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  • mcb3020 exam 1 part 1 with complete solutions
  • mcb3020 exam 1 part 1 stuvia
  • what is the role of microbes in maintain temperat

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MCB3020 Exam 1 Part 1 with Complete
Solutions
What is the role of microbes in maintain temperature on earth? (Role of microbes in CO2 and
CH4 recycling) - ANSWER - Microbes have an impact on atmospheric CO2 and CH4levels,
which impact global climate change. They are greenhouse gases. With too little of them, the
earth won't heat properly, and with too much of them, the earth will overheat


List the top three cause of death in the US. How role of microbes has changes over the last 100
years - ANSWER - In 1900 the top 3 causes of death were all infectious diseases. Now they are
heart disease, cancer, and stroke. None of which are microbe induced


List the major contributions to the science of microbiology discussed in slide 3 - ANSWER -
Louis Pasteur - disproved spontaneous generation using his "swan neck experiment"


Anthony Leeuwenhock - invented the first microscope


Edward Jenner - developed the first vaccine (smallpox vaccine)


John Snow - began epidemiology the study of how diseases spread


Robert Koch - Koch's postulates


Alexander Fleming - discovered penicillin (first antibiotic)


List and explain the impact of microbes on the environment (slide 4) - ANSWER - They were the
first living things on earth and were the ONLY living things for 2 billion years. Microbes played
important roles for both internal environments of organisms and external environments in which
these organisms live in. Without them, these organisms could not exist


Can live in places impossible for other organisms to survive

, Can be found in food, water, and soil. They help cycle the nutrients


Cell - ANSWER - the fundamental unit of life


Microbe - ANSWER - an organism that cannot be seen with the naked eye. Can only be seen
through a microscope


Hallmarks of the Cell x6 - ANSWER - things that all cells have:
Cell membrane
Genetic material (DNA) in chromosomes
Self-replication
Regulation
Similar macromoelcules
Energy use


Could Gus Steal Regular Strawberrries Earlier


What is the status of Prions, virions, and viruses? - ANSWER - Are acellular and non living


List effects of microbes on ecosystem. List extreme conditions at which microbes can thrive -
ANSWER - They dramatically increase the Earth's atmospheric oxygen levels. Play a role in
decomposition of dead organisms


List and define major chemical bonds used to connect biological molecules. x3 - ANSWER -
Ionic bonds - transfer electrons


Covalent bonds - share electrons


Hydrogen Bonds - positively charged H atoms interact with negatively charged atoms like N, O,
or F

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