Q: What type of protein fibers in the cytoskeleton are the narrowest?


Read this paragraph and choose the correct option from the provided answers:

Microfilaments Of the three types of protein fibers in the cytoskeleton, microfilaments are the narrowest. They function in cellular movement, have a diameter of about 7 nm, and are made of two intertwined strands of a globular protein called actin (Figure 4.23). For this reason, microfilaments are also known as actin filaments.

 Choices:

- macrophages

- mitosis

- capillaries

- microfilaments


A:
microfilaments