Download Bacteria in the Digestive System Quiz

Bacteria in the Digestive System Quiz
1. True or False: There are more bacterial cells in your body than human
cells.
2. True or False: There could be as many as 1,000 species of bacteria in
your digestive system.
3. Which two vitamins are produced by bacteria in the gut?
4. What type of relationship do gut bacteria have with their human hosts?
5. How many bacteria live in your digestive system?
6. Which bacteria help us digest plant food?
a) Lactobacillus
b) Bacteroides
c) E. coli
d) probiotic bacteria
7. Bacteria live in all areas of the gastrointestinal tract except the
a) large intestine.
b) small intestine.
c) stomach.
d) mouth.
8. Why are gut bacteria not attacked by the host immune system?
a) Because the bacteria appear as digestive system cells.
b) Because the bacteria are covered sugars produced by the digestive system
cells.
c) Because the immune system does not see these cells as foreign.
d) all of the above
9. What is a role of digestive system bacteria?
a) Break down fibers and some starches.
b) Break down poisons in the stomach.
c) Control the growth of helpful bacteria.
d) All of the above are roles of digestive system bacteria.
10. There are some plant foods that we cannot digest on our own. How do
bacteria help us digest these foods?
a) Bacteria produce enzymes that digest proteins in plant cells.
b) Bacteria produce enzymes that digest lipids in plant cell walls.
c) Bacteria produce enzymes that digest carbohydrates in plant cell walls.
d) Bacteria produce enzymes that digest carbohydrates in plant cell membranes.