MCB3020 Exam 1 Part 1 UPDATED
Questions and CORRECT Answers
What is the role of microbes in maintain temperature on earth? (Role of microbes in CO2 and
CH4 recycling) - CORRECT 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 - CORRECT 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 - CORRECT
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) - CORRECT
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 - CORRECT ANSWER - the fundamental unit of life
Microbe - CORRECT ANSWER - an organism that cannot be seen with the naked eye.
Can only be seen through a microscope
Hallmarks of the Cell x6 - CORRECT 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? - CORRECT ANSWER - Are acellular
and non living
List effects of microbes on ecosystem. List extreme conditions at which microbes can thrive -
CORRECT ANSWER - They dramatically increase the Earth's atmospheric oxygen levels.
Play a role in decomposition of dead organisms
Can live in nearly every extreme environment: extremely salty, extreme heat or cold, extreme
acidic or basic , with/without oxygen
Questions and CORRECT Answers
What is the role of microbes in maintain temperature on earth? (Role of microbes in CO2 and
CH4 recycling) - CORRECT 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 - CORRECT 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 - CORRECT
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) - CORRECT
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 - CORRECT ANSWER - the fundamental unit of life
Microbe - CORRECT ANSWER - an organism that cannot be seen with the naked eye.
Can only be seen through a microscope
Hallmarks of the Cell x6 - CORRECT 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? - CORRECT ANSWER - Are acellular
and non living
List effects of microbes on ecosystem. List extreme conditions at which microbes can thrive -
CORRECT ANSWER - They dramatically increase the Earth's atmospheric oxygen levels.
Play a role in decomposition of dead organisms
Can live in nearly every extreme environment: extremely salty, extreme heat or cold, extreme
acidic or basic , with/without oxygen
