alleryCilia and flagella share which internal microtubule arrangement?
A11 outer singlets around a single central tubule
B9 outer doublets around 2 central singlets (the 9+2 pattern)
C13 protofilaments laid in a flat ribbon
Dno microtubules; pure actin
Answer & Solution
Correct answer: B. 9 outer doublets around 2 central singlets (the 9+2 pattern)
Both cilia and flagella have the 9+2 microtubule arrangement: nine doublet outer microtubules surrounding two central singlets.
Conserved across eukaryotes.
Cilia are short and many
flagella are long and few engine is the same.
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