SM Microbial Identification & Classification

Question 1

Which staining technique is commonly used to differentiate bacterial species?

Accepted Answer

Gram stain

Answer

The Gram stain differentiates bacteria based on the structure of their cell walls, classifying them as Gram-positive or Gram-negative.

Question 2

What is the primary difference between prokaryotic and eukaryotic microorganisms?

Accepted Answer

Absence of a nucleus in prokaryotes

Answer

Prokaryotic cells, such as bacteria, lack a nucleus, whereas eukaryotic cells, such as fungi and protozoa, have a defined nucleus.

Question 3

Which molecular technique is commonly used for bacterial identification?

Accepted Answer

PCR

Answer

Polymerase Chain Reaction (PCR) amplifies specific DNA sequences, allowing for rapid and accurate bacterial identification.

Question 4

Which type of bacteria lacks a cell wall?

Accepted Answer

Mycoplasma

Answer

Mycoplasma species lack a cell wall, making them resistant to antibiotics that target cell wall synthesis, such as beta-lactams.

Question 5

Which classification system is commonly used to identify microorganisms?

Accepted Answer

Bergey’s Manual

Answer

The Bergey’s Manual of Systematic Bacteriology is widely used for classifying and identifying bacterial species based on morphological, biochemical, and genetic characteristics.

(SM) Specialist in Microbiology Practice Test

(SM) Specialist in Microbiology Practice Test

SM Microbial Identification & Classification