Which structure in the trachea contains the highest concentr

Which structure in the trachea contains the highest concentration of tubulin? a) cilia of the epithelium b) cartilage layer c) muscle layer d) nuclei of the epithelium

Solution

Answer: a) cilia of the epithelium (As explained below)

Tubulin is a dimer that goes in the formation of microtubules, which are a major component of cilia and flagella. So, high concentrations of tubulin are found in the mucosa of the trachea, which is the innermost layer consisting of ciliated pseudostratified columnar epithelium.