Complete Table 7 to show which elements are found in the following biological molecules - AQA - A-Level Biology - Question 9 - 2021 - Paper 1

To find the generation time, we will first read the population size from Figure 11:

• At time = 0 hours, the size of the population is approximately $10^7$ bacterial cells per cm³.
• At time = 4 hours, the size of the population is approximately $10^{10}$ bacterial cells per cm³.

Now, we can substitute these values into the equation:

$ext{Number of generations} = log_2 (10^{10}) - log_2 (10^{7})$

Calculating this gives us:

$ext{Number of generations} = 10 - 7 = 3$

Now, using the definition of generation time:

$ext{Generation Time} = \frac{\text{Time}}{\text{Number of generations}} = \frac{4 \text{ hours}}{3} \approx 1.33 \text{ hours}$

Model: Q (Name: Semi-conservative replication)

Explanation for first unsupported model (P): There should be two peaks in generation 1, whereas only one peak is shown.

Explanation for second unsupported model (R): There should be >2 peaks in generations 2/3, but instead we only observe overlapping peaks.