1. For simplicity, suppose a grain of sand is a cube that is 0.2 millimeter on each edge. About how many grains of sand packed tightly together would it take to
make a beach 300 meters long, 25 meters wide, and 5 meters deep?

Asuspension of yeast cells is being grown under anaerobic conditions such that glucose is degraded to ethanol and carbon dioxide. if one wishes to follow this process by monitoring the release of 14co2, at which positions in the glucose molecule would the 14c label need to be incorporated?