MICROBIOLOGY 243 CHAPTER 1 WRONE SCHOOLCRAFT
COLLEGE 2026/2027 | MICROBIOLOGY 243 CHAPTER 1
QUESTIONS, STUDY GUIDE & REVIEW
The human body is made up of more microbial cells than human cells. True or false - ANS✔✔
True
Describe a biological role of microbes. - ANS✔✔ Break down dead organisms and can even eat
industrial waste. Make nitrogen for plants, serve as food source for organisms
Describe a role that microbes have in animal digestion - ANS✔✔ Microorganisms are in the guts
of grazing cattle that helps to break down grass and hay, in humans they live in our colon and
break down foods we cannot, they make vitamin B and vitamin K.
Describe a role that microbes have in human food production. - ANS✔✔ Bacterial and yeast is
used to make beer, wine, cheese, yogurt, breads. They help in fermentation.
Describe a role that microbes have in bioremediation. - ANS✔✔ Microorganisms are being
developed to digest oil spills, explosives, and remove toxins from the soil.
What is a GO and how are microbes used in producing GMO? - ANS✔✔ Genetically modified
organisms. They take out the bacterial cell with the gene and put it in plants to make them
resistant to pest or drought. This is done in corn and soy crops. A whole plant can be produced
from one modified cell
Describe a role of microbes in discerning fundamental biologic processes - ANS✔✔ Biochemists
use microbes to study how the sequences of chemical reactions in living organism. Geneticists
use microbes to study hereditary information is transferred and controls the structure and
function of organisms.
COLLEGE 2026/2027 | MICROBIOLOGY 243 CHAPTER 1
QUESTIONS, STUDY GUIDE & REVIEW
The human body is made up of more microbial cells than human cells. True or false - ANS✔✔
True
Describe a biological role of microbes. - ANS✔✔ Break down dead organisms and can even eat
industrial waste. Make nitrogen for plants, serve as food source for organisms
Describe a role that microbes have in animal digestion - ANS✔✔ Microorganisms are in the guts
of grazing cattle that helps to break down grass and hay, in humans they live in our colon and
break down foods we cannot, they make vitamin B and vitamin K.
Describe a role that microbes have in human food production. - ANS✔✔ Bacterial and yeast is
used to make beer, wine, cheese, yogurt, breads. They help in fermentation.
Describe a role that microbes have in bioremediation. - ANS✔✔ Microorganisms are being
developed to digest oil spills, explosives, and remove toxins from the soil.
What is a GO and how are microbes used in producing GMO? - ANS✔✔ Genetically modified
organisms. They take out the bacterial cell with the gene and put it in plants to make them
resistant to pest or drought. This is done in corn and soy crops. A whole plant can be produced
from one modified cell
Describe a role of microbes in discerning fundamental biologic processes - ANS✔✔ Biochemists
use microbes to study how the sequences of chemical reactions in living organism. Geneticists
use microbes to study hereditary information is transferred and controls the structure and
function of organisms.
