The student's question involves the calculation of diffusion times for hemoglobin and DNA in water, which requires knowledge of their specific diffusion coefficients. While hemoglobin generally diffuses more slowly due to its larger size, exact timings without diffusion coefficients cannot be calculated.
The student is asking about the difference in diffusion times for hemoglobin and DNA in water. This can be analyzed using the principles of diffusion as applied in techniques such as gas chromatography. Unfortunately, without specific diffusion coefficients for both substances in water, an exact time cannot be calculated.
The concept, however, is that larger, more massive molecules tend to diffuse more slowly due to having lower average speeds at a given temperature and making more collisions during their random walk. Given that hemoglobin has a larger molecular mass compared to the DNA nucleotides, it's expected to diffuse more slowly in water.
To find out how much time passes before the hemoglobin is 1.50 seconds ahead of the DNA in diffusion, one would generally use the formula for diffusion time in terms of the diffusion coefficient (D), which is not provided here. Importantly, since the context is gas chromatography, studies of hemoglobin in blood suggest that its properties, such as how it binds to oxygen, do play a role in its diffusion behavior. However, the way hemoglobin and DNA diffuse in water would differ significantly from their behavior in a gaseous environment like that used in chromatography.