An organism such as Mycobacterium tuberculosis would absorb which stain in its cell wall?

a. Crystal violet
b. Methylene blue
c. Carbolfuchsin
d. Malachite green


C
M. tuberculosis contains mycolic acids in its cell wall and will stain acid-fast positive. Carbol-fuchsin is absorbed into the cell wall, which stains the cells pink to red. The primary stain is also in the Kinyoun acid-fast staining procedure.

Biology & Microbiology

You might also like to view...

Refer to Figure 31-5. What is the function of the structure labeled 6?

A. circulation B. reproduction C. digestion D. movement E. respiration

Biology & Microbiology

Limulus polyphemus are the source of ________

A) calcitonin used to treat osteoporosis B) growth hormone used to treat dwarfism C) hydroxyapatite used to treat arthritis D) cells for the LAL test used to detect bacterial contamination of surgical tools E) Prialt, a peptide used as a pain reliever

Biology & Microbiology

Using the product rule, determine the probability that an Aa individual will be produced from an Aa x Aa cross.

a) 25% b) 50% c) 75% d) 100% e) 0%

Biology & Microbiology

Which hormone stimulates and maintains metabolic processes?

A) calcitonin B) thyroxine C) oxytocin D) melatonin

Biology & Microbiology