Which of the following includes all the major elements of life?

Question

BlackTom AI · Accepted Answer

The question asks: Which of the following includes all the major elements of life?

First, note that the answer options list is missing in the data provided, so we only have a single candidate to evaluate: "Oxygen, Carbon, Hydrogen, Nitrogen, Phosphorous and Sulphur". In biology, the phrase 'major elements of life' typically refers to the CHNOPS elements: Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, and Sulfur. These six elements are the fundamental building blocks for organic molecules and biological systems.

Option candidate analysis:
- Oxygen: Essential as a major element; part of water, most organic molecules, and cellular respiration. Its presence is crucial for life as we know it.
- Carbon: Central to all organic chemistry; the backbone of vast majority of biomolecules (carbohydrates, proteins, lipids, nucleic acids).
- Hydrogen: Major component of water and organic molecules; participates in a wide range of biochemical reactions and energy transfer processes.
- Nitrogen: Vital for amino acids, nucleotides, and many cofactors; without nitrogen, proteins and DNA/RNA could not be formed in living organisms.
- Phosphorus: Key in nucleic acids (DNA/RNA) and energy carriers (ATP); also important in cell membranes (phospholipids).
- Sulfur: Present in some amino acids (cysteine, methionine) and coenzymes; contributes to protein structure via disulfide bonds.

Collectively, these six elements account for the majority of the mass and function of biological macromolecules. The listed elements correspond to the conventional CHNOPS set, with minor spelling variations: Phosphorous/Phosphorus and Sulphur/Sulfur are just alternate spellings used in different varieties of English.

Potential caveats: While CHNOPS covers the major framework, many texts also emphasize additional trace elements that are essential in smaller amounts for some organisms (e.g., iron, magnesium, calcium, zinc, manganese, iodine, etc.). However, the core list of major elements remains CHNOPS.

In summary, the candidate set Oxygen, Carbon, Hydrogen, Nitrogen, Phosphorous and Sulphur aligns with the widely accepted CHNOPS group of major life elements, making it the correct representation among typical answer choices. The absence of other options prevents comparison, but the chosen set accurately reflects the principal constituents of biomolecules.

2025 T1 DP DPST1051 BLSC1342 Molecules, Cells & Genes

Which of the following includes all the major elements of life?

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