DNA was extracted form Strptococcus bacterium. The propterium. The Proportion of Adenine was found to be 28% then calculate the amount of cytosine

Explanation

To solve the problem of calculating the amount of cytosine in the DNA extracted from the Streptococcus bacterium, we can follow these steps based on Chargaff's rules.

### Step-by-Step Solution:

1. **Understand Chargaff's Rules**: Chargaff's rules state that in a double-stranded DNA molecule, the amount of adenine (A) is equal to the amount of thymine (T), and the amount of cytosine (C) is equal to the amount of guanine (G).

2. **Identify the Given Information**: The problem states that the proportion of adenine (A) is 28%.

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