Staining Quiz

Question 1

Purpose of a simple stain?

Answer 1

To see morphology

Question 2

What is capsule staining?

Answer 2

Negative staining is used to visualize capsules

Question 3

What color are gram-pos and gram-neg bacteria in a Gram stain?

Answer 3

Gram-pos - purple
Gram-neg - pink

Question 4

What are the colors of acid-fast and non acid-fast bacteria in an acid-fast stain?

Answer 4

Acid-fast - red
Non acid-fast - blue

Question 5

What bacteria can form endospores?

Answer 5

Bacillus and Clostridium genuses

Question 6

What shape is bacillus?

Answer 6

Rod-shaped

Question 7

What shape is coccobacillus?

Answer 7

Short rods

Question 8

What shape is coccus?

Answer 8

Round

Question 9

What shape is vibrio?

Answer 9

Curved rod

Question 10

What shape is spirillum?

Answer 10

Spiral without movement

Question 11

What shape is spirochete?

Answer 11

Spiral with movement

Question 12

What shape is pleomorphic?

Answer 12

Many shapes - they can vary in shape

Question 13

What grouping is diplococcus?

Answer 13

Groupings of 2 cells

Question 14

What grouping is streptococci/streptobacilli?

Answer 14

Chains of cells (either coccus or bacillus)

Question 15

What grouping is tetrad?

Answer 15

4 cells

Question 16

What grouping is sarcina?

Answer 16

8 cells

Question 17

What grouping is staphylococci?

Answer 17

Irregular cluster of cells (like a cluster of grapes)