The animal cell is different from a plant cell in having

The principal protein of cilia and flagella is

$S$ - Statement: Basal bodies are associated with the formation of cilia and flagella.
$R$ - Reason: Nucleoli contain the nucleus and chromatin material.

Centrosome is found in

Identify the components labelled $A, B, C$ and $D$ in the given section of cilia/flagella showing different parts. Choose the option which shows the correct labelling of parts.

In a eukaryotic cell,which of the following organelles does not possess a membrane?