Atmosphere Gas Identification
The question asks to identify the gas that constitutes 78% of the Earth's atmosphere and is also a vital component of molecules essential for life.
- Nitrogen (N2): This gas makes up approximately 78% of the Earth's atmosphere. It is also a fundamental element in many biological molecules, including amino acids (building blocks of proteins) and nucleic acids (like DNA and RNA).
- Oxygen (O2): While crucial for respiration and life, Oxygen only makes up about 21% of the atmosphere.
- Carbon (C): Carbon is the backbone of all organic life but exists in the atmosphere mainly as carbon dioxide (CO2), which is less than 1% (around 0.04%).
- Helium (He): This is an inert gas found in trace amounts in the atmosphere and is not directly essential for most life processes in the same way nitrogen is.
Based on the analysis, Nitrogen is the gas that meets both criteria: it comprises 78% of the atmosphere and is a key component of essential biological molecules.
Similar Questions
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Important Questions from Climatology
Consider the following statements about anticyclones :
1. Anticyclones are high pressure systems.
2. Air in the centre of the system must be subsiding.
3. Anticyclones are characterized by converging winds.
How many of the above statements is/are correct?
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Which one of the following is a cold local wind?
