Bacteria Flashcards
Bacteria are unicellular or multicellular prokaryotic organisms
Unicellular prokaryotic organisms.
The sizes of bacteria vary between
O.1 to 10.0 micrometres
What is the unit of measurement in bacteriology
Micrometre
The diameter and length of Bacteria of medical importance measurea between
Diameter (0.2-1.5 micrometres)
Length (2-8 micrometres)
Because bacteria are prokaryotic their sedimentation rate is
70S
Which of the following is rod-shaped, endospore forming aerobic or facultative anaerobic , Gram-positive bacteria that are ubiquitous in nature.
A. Bacilli
B. Coccu
Bacilli
According to shape bacteria is classified into
Spiral
Rod
Cocci
Which has a grape-like shape
Streptococcus
Staphylococci
Diplococci
Tetrads
Staphylococci
Which of the following is Gram-positive and remains attached during cell division
A. Bacilli
B. Cocci
Cocci
Give the classifications of bacteria according to
Pairs, chains, grape- like and clusters of four
Diplococci
Streptococci
Staphylococci
Tetrads
Spiral bacteria is classified into
Vibrio
Spirilla
Spirichetes
With of the following is slightly curved or comma shaped bacterial cell which is generally single and 2-3 micrometres
A. Vibrios
B. Spirilla
C. Spirochetes
Vibrios
A bacterium with rigid spiral (helical) structure (not easily band, not flexible), thick, long and move with flagella, spiral Shape is known as
Spirillum
What is the length of Spirilla
6-15 micrometres
Which of the following moves by axial filaments
A. Vibrio.
B. Spirilla
C. Spirochetes
Spirochetes
Obligate aerobes
Obligate anaerobes
Facultative anaerobes
Those bacteria that require oxygen to grow
Those bacteria that are poisoned by oxygen
Those that can grow with or without oxygen.
What are the examples of Gram-positive bacteria
Staphylococcus
Streptococcus
Clostridium
Bacillus
Examples of Gram-negative bacteria
E. Coli
H. Pylori
Salmonella spp
Shigella spp
An example of an acid fast bacteria is
Mycobacterium
An example of a wall less bacteria
Mycoplasama
Gram-negative and Gram-positive bacteria have what type of walls
Lipopolysaccharide and peptidoglycan walls respectively.
Which of the following retains the crystal violet dye and changes to purple while standing.
A. Gram-positive
B. Gram-negative
Gram-positive bacteria
Based on cell wall structure bacteria can be classified into
Gram-positive
Gram-negative
Acid fast
Wall-less
Which of the following have periplasmic space present
A. Gram-positive
B. Gram-negative
Gram-negative
Which of the following has Teichioc acid present
A. Gram-positive
B. Gram-negative
Gram-positive bacteria
Which of the following is susceptible to enzyme lysosome and penicillin.
A. Gram-positive
B. Gram-negative
Gram-positive
