Supposed you have a way to measure the amount of DNA in one cell during the cell cycle.

  Supposed you have a way to measure the amount of DNA in one cell during the cell cycle. You first measure the amount at the G1 phase. At what points in the rest of the cycle will you see a change in the amount of DNA per cell. Explain. In the kidneys, water moves by osmosis from tubules called nephrons to the bloodstream. Do you expect a nephron to be hypotonic, isotonic, or hypertonic relative to the blood? Explain. Examine the structure of sucrase (see figure). Where in the protein might you expect to find the following amino acids: valine, proline, glutamic acid, and threonine. Explain your answer for each. Some algae have complex glassy structures (silica) in their cell walls. The structures form within the Golgi and end up outside of the cell. How do they get to the cell wall without having to pass through a membrane?