Question

question 6 (1 point)
what two stains were used in capsule staining?
crystal violet and grams iodine
malachite green and safranin
nigrosin and methylene blue
congo red and manevals stain
question 7 (1 point)
all bacteria can be identified by just looking at the colonies and gram staining.
true
false
question 8 (bonus) (1 point)

Explanation:

• For Question 6: Nigrosin and methylene blue are commonly used in capsule staining. Nigrosin is a negative stain that colors the background, while methylene blue stains the bacterial cell, making the capsule visible as a clear - zone between the stained cell and the stained background.
• For Question 7: Not all bacteria can be identified just by looking at colonies and gram - staining. Some bacteria may have similar colony morphology and gram - staining results, and additional tests like biochemical tests, DNA sequencing etc. are often required for accurate identification.

Answer:

Question 6: C. nigrosin and methylene blue
Question 7: B. False