What type of protein is the GLUT-transporter?
A. Channel
B. Carrier
C. Pump

4.3. 5 Glucose transporter. Glucose transporter (GLUT) is a facilitative transport protein involved in glucose translocation across the cell membrane. Seven isoforms of GLUT have been identified and their names are based on order of cloning as GLUT1 to GLUT7 [58].

Explanation:

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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.