Please see the attached file of red blood cell. Inside and outside the concentration is same in the isotonic solution. So , blood celll do not shrink and swell when we placed in isotonic solution.
Option A => Glucose can pass through specific proteins in the cell membrane.
Ok, we are are given the following information or data from the question above that is;
(1). "red blood cells in an isotonic solution."
(2). "Then they add radioactive glucose to the solution."
(3). "They observe that levels of radioactivity increase in the interior of the cell, indicating that the cell has taken up the radioactive glucose from the solution."
Key observation: glucose is able to pass through the cell membranes because of transporters which are known as transmembrane proteins. Glucose in particular is transported through a uniporterin the red blood cells
stays the same
The isotonic solution is the same concentration of the cell, so molecules flow in and out at the same pace.
Here i provide you what i consider are the correct answers:
1) Cell pumps
4) Prokaryotes have no nucleus
5) I cannot see the illustration "3" sorry!
6) Membrane proteins
7) The cell membrane
9) I cannot see the picture, but you shouldn't see shrunk or swollen cells, just normal cells in shape and size
11) I cannot see the illustration sorry!
13) do NOT need ATP
15) All the above
16) membrane-bound organelles.