15 Questions
What are the three shapes of bacteria mentioned in the text?
Cocci, bacilli, spirochetes
What is the size range of most bacteria according to the text?
1 to 3 μm
Which component provides structural support and maintains the characteristic shape of a bacterial cell?
Peptidoglycan
Which bacteria are bounded by a cell membrane, not a cell wall?
Mycoplasma species
What are the three patterns in which cocci can be arranged?
Pairs (diplococci), chains (streptococci), clusters (staphylococci)
Which of the following diseases is commonly associated with Escherichia coli?
Urinary tract infection
What is the habitat of Escherichia coli?
Human colon
How is Escherichia coli acquired during birth in neonatal meningitis?
Through the birth canal
What type of colonies does Escherichia coli form on Eosin-Methylene Blue (EMB) or MacConkey’s agar?
Lactose-fermenting colonies
How can Escherichia coli be differentiated from other lactose-positive organisms in laboratory diagnosis?
By biochemical reactions
Which of the following diseases is commonly associated with Escherichia coli?
Urinary tract infection (UTI)
What is the habitat of Escherichia coli?
Human colon
How is Escherichia coli acquired during birth in neonatal meningitis?
Acquired during birth from the mother
What type of colonies does Escherichia coli form on Eosin-Methylene Blue (EMB) or MacConkey’s agar?
Lactosefermenting colonies with green sheen on EMB agar
What are the characteristics of Escherichia coli?
Facultative gram-negative rods; ferment lactose.
Test your knowledge on the shapes and sizes of bacteria with this quiz prepared by Dr. Omar Aljumaili. Learn about cocci, bacilli, and spirochetes, as well as their arrangements in pairs, chains, and clusters.
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