What are some examples of human cells that produce proteins for the human body structure?

Some of the proteins which help to form human body structures are:

Keratinocytes: Keratinocytes can be described as cells which make the protein named keratin. Keratin is the main proteins which helps to structure our hair and nails.

Connective cells: The connective cells of the body are involved in the formation of a protein named as collagen. Collagen is a structural protein which is essential to maintain the skeletal structure of humans.

answer-

the statement that f(x) = |x+a| + b has exactly one x-intercept is sometimes correct.

solution-

it solely depends on b, whether the function will have one or two or zero x intercept.

this plot of the given function, f(x) = |x+a| + b will be the basic absolute value graph i.e v shape, with vertex translated to (-a, b), instead of origin.

1-   if b is zero, the graph will have exactly one x-intercept, at x= -a

2- if b is positive, the whole graph will be above the x-axis, hence it will have no x-intercepts.

3- if b is negative, the graph will be below the x-axis, hence it will have two x-intercepts.

∴ the statement is sometimes true.