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 -...
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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