Biology
Grade-7
Easy
Question
_____________ is an essential component of nucleic acid DNA.
- Oxygen
- Hydrogen
- Nitrogen
- Carbon
Hint:
The gas that is present more in the atmosphere.
The correct answer is: Nitrogen
- Nitrogen is an unique element that is required for DNA
- DNA is made up of nucleotides
- Nucleotides contain nitrogenous bases: adenine, guanine, cytosine and thymine
- Besides DNA, proteins also require nitrogen
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