(a) A DNA segment has a total of 1000 nucleotides, out of which 240 of them are adenine containing nucleotides. How many pyrimidine bases this DNA segment possesses?
(b) Draw a diagrammatic sketch of a portion of DNA segment to support your answer.

Explanation

### Step-by-Step Solution

**(a)** To determine the number of pyrimidine bases in the DNA segment, we can follow these steps:

1. **Identify the Total Number of Nucleotides**: The total number of nucleotides in the DNA segment is given as 1000.

2. **Identify the Number of Adenine Nucleotides**: The number of adenine (A) nucleotides is given as 240.

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