Question

initially, glucose was found only inside the dialysis tubing. after 15 minutes, a sample was taken. that sample showed that glucose was found the dialysis tubing. inside outside both inside and outside neither inside nor outside

Explanation:

Dialysis tubing is semi - permeable. Glucose molecules can pass through it by diffusion. Since glucose was initially inside and there is a concentration gradient, it will move outwards over time. So after 15 minutes, it will be found both inside and outside due to the process of diffusion down its concentration gradient.

Answer:

both inside and outside