Name two biologically important compounds that contain both oxygen and nitrogen.

Explanation

To answer the question, "Name two biologically important compounds that contain both oxygen and nitrogen," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify compounds that are biologically significant and contain both oxygen (O) and nitrogen (N).

2. **Identify Biologically Important Compounds**:
- Start by recalling what compounds are essential for biological processes.
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