Question

based on this ftm tube result, how would you classify this organism?

a. facultative anaerobe
b. obligate aerobe
c. obligate anaerobe

what type of metabolism is occurring at the top of the ftm tube?

a. the organism will be using aerobic metabolism.
b. the organism will be using anaerobic metabolism.
c. the organism will use either aerobic or anaerobic metabolism.

Explanation:

Analyze the growth pattern in the FTM tube

The Fluid Thioglycollate Medium (FTM) tube shows dense growth concentrated at the top (aerobic zone) and continuous, lighter growth throughout the rest of the tube (anaerobic zone). This distribution is characteristic of a facultative anaerobe, which can grow in both the presence and absence of oxygen but grows better at the top where oxygen is available.

Determine the metabolism at the top of the tube

At the very top of the FTM tube, oxygen is abundant. Since the organism is a facultative anaerobe, it will preferentially utilize aerobic respiration (aerobic metabolism) in this oxygen-rich zone because it yields significantly more ATP than anaerobic pathways.

Answer:

Question 1

• A. Facultative anaerobe (Correct answer)
• B. Obligate aerobe
• C. Obligate anaerobe

Question 2

• A. The organism will be using aerobic metabolism. (Correct answer)
• B. The organism will be using anaerobic metabolism.
• C. The organism will use either aerobic or anaerobic metabolism.