Question

What were the 4 characteristics that the old method of mycobacterium classification was based on?

1) Cell wall structure, staining properties, growth rate, and biochemical characteristics
2) Cell wall structure, staining properties, genetic material, and metabolic pathways
3) Cell wall structure, staining properties, growth rate, and genetic material
4) Cell wall structure, staining properties, metabolic pathways, and biochemical characteristics

Answer 1

The old method of mycobacterium classification was based on cell wall structure, staining properties, growth rate, and biochemical characteristics.

Step-by-step explanation:

The old method of mycobacterium classification was based on several characteristics, including cell wall structure, staining properties, growth rate, and biochemical characteristics. When considering these factors, the correct answer to the question regarding the four characteristics used in mycobacterium classification is:

1. Cell wall structure
2. Staining properties
3. Growth rate
4. Biochemical characteristics

These criteria allow scientists to differentiate between mycobacterial species. Key components such as the presence of mycolic acid in the cell walls, which necessitates specialized staining techniques like the acid-fast stain, are crucial identifiers. Mycobacteria are known for their slow growth rate, and their biochemical characteristics aid in further distinguishing them, as outlined in Bergey's Manual of Determinative Bacteriology.