Microbial Identification Quiz

What is the primary purpose of microbial identification?

• To analyze the genetic code of all microorganisms

• To classify microorganisms based on distinct characteristics

• To prevent microbial contamination in samples

• To grow microorganisms in controlled environments

Which of the following is NOT considered in microbial identification?

• Morphological characteristics

• Biochemical properties

• Environmental requirements

• Nutritional habits of viruses

What does colony morphology include?

• The genetic composition of microorganisms

• Size, shape, color, and margin of colonies

• Microscopic arrangement of cells

• The metabolic pathways of bacteria

What type of stain differentiates bacteria as Gram-positive or Gram-negative?

• Acid-fast stain

• Endospore stain

• Gram stain

• Flagellar stain

Which test can identify acid-fast organisms like Mycobacterium?

• Gram stain

• Acid-fast stain

• Catalase test

• Oxidase test

Bacilli refer to microorganisms with which shape?

• Spherical

• Rod-shaped

• Spiral

• Cuboidal

What is an example of a vibrio-shaped bacterium?

• Escherichia coli

• Vibrio cholerae

• Staphylococcus aureus

• Bacillus anthracis

Which bacterial arrangement resembles grape-like clusters?

• Diplococci

• Streptococci

• Staphylococci

• Tetrads

What is a significant characteristic of microorganisms with a high surface-to-volume ratio?

• Faster nutrient diffusion

• Slower growth rates

• Resistance to staining

• Larger colony size

What tool is essential for observing cell morphology?

• Petri dish

• Microscope

• Autoclave

• Incubator