Structures called microtubules are found
in the cytoplasm of most eukaryotic
cells. microtubules are made up of
proteins and shape and support
the cell.
which of the following elements are
most abundant in microtubules?
a. lead and zinc
b. nitrogen and carbon
c. sodium and chlorine
d. iodine and magnesium

The right answer for the question that is being asked and shown above is that:  "C. sodium and chlorine." Structures called microtubules are foundin the cytoplasm of most eukaryotic cells. Microtubules are made up of
proteins and help shape and support the cell. Sodium and chlorine are the elements that are most abundant in microtubules.

Ihaven't done that yet, so no idea,but this is not the right place to ask