In DNA and RNA, nitrogen atom is present in the ring system. Can Kjeldahl method be used for the estimation of nitrogen present in these ? Give reasons.

Explanation

### Step-by-Step Solution:

1. **Understanding the Kjeldahl Method**: The Kjeldahl method is a widely used technique for the determination of nitrogen content in organic compounds. It involves converting nitrogen in the sample to ammonium sulfate, which can then be quantified.

2. **Nature of Nitrogen in DNA and RNA**: In DNA and RNA, nitrogen is primarily found in the form of heterocyclic rings. These rings contain nitrogen atoms as part of their structure, contributing to the overall molecular framework of nucleotides.

3. **Limitations of the Kjeldahl Method**: The Kjeldahl method is designed to estimate nitrogen that can be converted to ammonium ions (NH4+). However, the nitrogen present in the heterocyclic rings of DNA and RNA is not in a form that can be easily converted to ammonium ions.

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