Which statement about intermediate filaments is true?
A) Rather than consisting of a single type of protein, they can be made up of a number of different proteins.
B) They are involved in cell movement.
C) The basic structure of an intermediate filament protein is a globular head and a long $\alpha$-helical tail.
D) Like microfilaments, they exhibit treadmilling.

Question

Quizplus · Accepted Answer

Intermediate filaments are composed of various protein types, including keratins, vimentin, and lamin.

Answer: C 
 The structure of an intermediate filament protein includes a central α-helical region, not a globular head and long tail.

Answer: B and D are incorrect 
 Intermediate filaments are not involved in cell movement, and they do not exhibit treadmilling like microfilaments.

Which Statement About Intermediate Filaments Is True? A) Rather Than α\alphaα

Which Statement About Intermediate Filaments Is True?
A) Rather Than $\alpha$