Final answer:
Water will move into the red blood cell due to the hypotonic environment created by lower solute concentration outside the cell. This can lead to the cell swelling and potentially rupturing, a process known as hemolysis.
Step-by-step explanation:
When a red blood cell is placed in a solution where inside the cell is 93% water and 7% Solute B, and the solution it is placed in is 99% water and 1% Solute B, we need to determine the direction of water movement and the effect on the red blood cell's shape.
Because the concentration of Solute B inside the cell is higher than in the surrounding solution, the environment is hypotonic to the cell. Accordingly, water will move into the cell via osmosis, leading to the cell swelling. If the water continues to flow into the cell unchecked, the cell will undergo hemolysis, where the cell swells and potentially bursts due to the influx of water.
Regarding the cell's shape, in a hypotonic solution, the red blood cell will become visibly swollen as water rushes in, and this can eventually result in the cell rupturing. If placed in an isotonic or hypertonic environment, the cell would maintain its normal shape or shrink, respectively. However, in this case, the lack of mechanisms to control water uptake in red blood cells makes them particularly susceptible to changes in osmotic conditions.