6th Grade · Science · Quiz · shared by Luke Morgan
Get a free 6th Grade Science quiz on the human gut microbiome. Understand the critical role of bacteria in digestion and plant fiber breakdown.
Multiple Choice
1. _____ Where does the bacterium Bacteroides thetaiotaomicron primarily make its home?
A. The stomach
B. The small intestine
C. The large intestine
D. The mouth
2. _____ According to the passage, what are complex carbohydrates and fibers made of?
A. Long, tangled chains of sugar molecules
B. Simple proteins called enzymes
C. Short chain fatty acids
D. Microscopic pieces of fruit skin
3. _____ Why does the human body need help from B. theta to process plant fibers?
A. The body is too busy digesting simple sugars.
B. The stomach and small intestine lack the tools to handle sturdy fibers.
C. The fibers are too small for the stomach to sense.
D. Plant fibers can only be digested in the dark.
4. _____ What "tools" does B. theta use to snip long chains of fiber into smaller pieces?
A. Fermentation acids
B. Sugar molecules
C. Special proteins called enzymes
D. Colon wall cells
5. _____ How many different types of these "chemical scissors" does B. theta have?
A. Only one specialized type
B. Exactly ten different types
C. Hundreds of different types
D. The text does not say how many.
6. _____ What is the specific name for the process of breaking down these fibers?
A. Symbiosis
B. Fermentation
C. Disassembling
D. Absorption
7. _____ During the chemical reaction, what helpful substances are released by the bacteria?
A. Plant materials
B. Complex carbohydrates
C. Short chain fatty acids
D. Fiber fuel
8. _____ What happens to the short chain fatty acids produced by the bacteria?
A. They are released as waste from the body.
B. They are absorbed by the walls of the colon.
C. They turn back into complex plant fibers.
D. They are used to create new bacteria.
9. _____ The relationship between humans and B. theta is called symbiosis because:
A. One organism lives inside another and causes sickness.