Keratins are intermediate filaments that ...
A) are localized inside the nucleus.
B) are composed of 50% type I and 50% type II keratin proteins.
C) are bundled in the epidermis to make cells more flexible.
D) anchor the intermediate filament network at the adherens junctions.
E) All of the above.

Question

Quizplus · Accepted Answer

Keratins give cells mechanical strength, and provide tough coverings for animals. Every keratin filament is composed of an equal mix of type I (acidic) and type II (neutral/basic) keratins. These filaments are also involved in anchoring the cell cytoskeleton at desmosomes and hemidesmosomes.

Keratins Are Intermediate Filaments That