16 Questions
What is the genetic material contained in bacterial cells?
A single, long molecule of double-stranded DNA
What is the function of plasmids in bacteria?
To confer certain properties such as drug resistance and bacteriocin production
How do plasmids replicate in bacterial cells?
Independently of the chromosome or by integration with it
What are mesosomes (chondroids) in bacterial cells?
Complex or multilaminated membranous bodies formed as invaginations of the plasma membrane into the cytoplasm
What is the function of mesosomes (chondroids) in bacterial cells?
Unclear, but they are involved in various cellular activities such as cell division and respiration
How do plasmids pass on to progeny in bacterial cells?
Through conjugation or the agency of bacteriophages
What is the function of fimbriae or pili in gram-negative bacteria?
Protect the bacterium from phagocytosis
What is the function of capsules in bacteria?
Protect the bacterium from phagocytosis
Where do mesosomes develop in gram-positive bacteria?
Sites of cross-wall formation
Which structure is the location for all bacterial protein synthesis?
Ribosomes
What is the function of gas vesicles in bacteria?
Store gases to provide buoyancy
What are the hair-like surface appendages found in many gram-negative bacteria?
Fimbriae or pili
What is the function of flagella in motile bacteria?
Facilitate bacterial mobility
Where is the single circular chromosome of deoxyribonucleic acid (DNA) located in bacterial cells?
In the cytoplasm
Which structure protects the cell wall of bacteria from attack by antibacterial agents?
Capsules
What is predominantly found in the cytoplasmic region of a well-studied bacterium?
Ribosomes
This quiz explores the functions of plasmids in bacteria, including their role in conferring properties such as drug resistance, bacteriocin production, and enhanced pathogenicity. It also covers their significance in providing a survival advantage to the host.
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