Question

question 12
1 part -- of 2 points
the distribution of melanosomes in cells is tightly regulated in animals that rapidly change colour. dark - coloured cells have melanosomes scattered throughout the cytoplasm while light - coloured cells have them aggregated near the nucleus. how could cells use microtubules and motor proteins to change the distribution of melanosomes?

Explanation:

Microtubules serve as tracks for motor - proteins. Motor proteins can move along microtubules, carrying melanosomes. In light - coloured cells, motor proteins move melanosomes towards the cell center (nucleus), aggregating them there. In dark - coloured cells, motor proteins move melanosomes away from the nucleus, scattering them throughout the cytoplasm.

Answer:

Motor proteins can move along microtubules. They can transport melanosomes either towards the nucleus (causing aggregation in light - coloured cells) or away from the nucleus (causing scattering in dark - coloured cells).