Question

Scientists dye cells using fluorescent molecules that bind to the cell membrane so that the cells can be seen under a microscope. Proper visualization of a human egg cell under the microscope requires that a high enough concentration of dye molecules be attached to the cell membrane. Which value would be important for determining how many dye molecules would need to bind to the egg in order to visualize it?
a. the volume of the egg
b. the surface of the egg
c. both the surface and the volume of the egg

Answer 1

B is correct. cause with microscope you look at the surface

Answer 2

Answer:

b. the surface of the egg

Explanation:

Fluorescent dyes bind on the protein exposed on the surface of the cell membrane. A cell with a greater surface area will require more florescent dye and vice versa. The fluorescent dyes attach covalently to the cell surface protein and is resistant to cell permeabilization. Fluorescent dyes bind to the cell membrane irrespective of the volume of the cell.