Quiz on Bacteria Classification and Gram Staining

What is the primary kingdom that includes Eubacteria?

• Kingdom Fungi

• Kingdom Eubacteria

• Kingdom Protista

• Kingdom Archaea

Who developed the Gram-stain technique?

• Alexander Fleming

• Hans Christian Gram

• Robert Koch

• Louis Pasteur

In what year was the Gram-stain technique developed?

• 1904

• 1894

• 1884

• 1874

What color do Gram-positive bacteria stain?

• Purple

• Green

• Pink

• Yellow

What is the structure of the cell wall in Gram-negative bacteria?

• Cellulose layer

• No peptidoglycan

• Thin layer of peptidoglycan

• Thick layer of peptidoglycan

Which type of bacteria retains the purple dye?

• Gram-positive

• Bacilli

• Gram-negative

• Cocci

What is the appearance of Gram-negative bacteria after staining?

• Purple

• Pink

• Blue

• Red

Which of the following is NOT a shape classification of bacteria?

• Cocci

• Bacilli

• Vibrio

• Spirilla

What type of bacteria are Streptococcus and Staphylococcus?

• Gram-negative

• Bacilli

• Cocci

• Gram-positive

What color do Gram-negative bacteria stain?

• Purple

• Orange

• Pink

• Brown