Question

1.

Which best describes the shape of myoglobin, which in many ways is a typical protein?

a complex three-dimensional shape formed from many twisted helixes

a cylindrical shape that forms from a single twisted helix

a straight chain, like beads on a straight piece of string

a highly-branched chain, much like the branches of a maple tree

Answer 1

Myoglobin, like most proteins, has a complex three dimensional structure that is formed from many twisted helices. There are more than one helix, and it does not look like beads on a straight piece of string. It is not branched.