Multiple Choice
Which cellular structures are involved in conjugation?
7. Prokaryotic Cell Structures & Functions
Pili
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________ is the mechanism where a bacterial cell uses its pili to crawl across a surface towards a destination:
A
Conjugation
B
Gliding motility
C
Cell swimming
D
Twitching motility
E
None of the above
Verified step by step guidance1
Begin by understanding the function of pili in bacterial cells. Pili are hair-like structures on the surface of bacteria that can be used for attachment to surfaces or other cells.
Recognize that twitching motility is a form of bacterial movement that involves the extension and retraction of pili, allowing the cell to move across surfaces.
Differentiate twitching motility from other forms of bacterial movement such as conjugation, which involves the transfer of genetic material, and gliding motility, which is a smooth movement without the use of flagella or pili.
Understand that cell swimming typically involves the use of flagella for movement in liquid environments, which is distinct from twitching motility that occurs on solid surfaces.
Conclude that twitching motility is the correct mechanism where a bacterial cell uses its pili to crawl across a surface towards a destination, as opposed to the other options listed.
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