The main constituents of living matter are carbon compounds. Which of these compounds is not a carbon based compound that is important to life.

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The question asks which compound is not a carbon-based one that is important to life, despite carbon compounds being the main constituents of living matter.
Option 1: DNA. This is a carbon-based macromolecule composed of nucleotides; its backbone and side chains rely on carbon, hydrogen, oxygen, nitrogen, and phosphorus, making it a classic example of a carbon-containing biomolecule essential to genetic information storage and transmission.
Option 2: Proteins. Proteins are also carbon-based, built from amino acids that contain carbon in their backbone and side chains; they perform a wide range of functions from catalysis to structure, all relying on carbon-containing chemistry.
Option 3: Glucose. Glucose is a simple sugar that is a carbon-based molecule (C6H12O6). It plays a central role in energy metabolism and is a fundamental carbon source for many biological processes.
Option 4: Water. Water is H2O and contains no carbon; it is inorganic. Although absolutely vital for life, it is not a carbon-containing compound and therefore does not fit the definition of a carbon-based compound important to life in the chemical sense.
Option 5: RNA. Like DNA, RNA is a carbon-based polymer formed from ribonucleotides and is essential for coding, decoding, regulation, and expression of genes in cells.
In summary, four of the options (DNA, proteins, glucose, RNA) are carbon-based biomolecules central to living systems, while water is not carbon-based, though it is indispensable for life processes.

CHEM 110 Section 3 (PM) SP25 Pre-Lecture 22 Quiz C10-1-2

The main constituents of living matter are carbon compounds. Which of these compounds is not a carbon based compound that is important to life.

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CHEM 110 Section 3 (PM) SP25 Pre-Lecture 22 Quiz C10-1-2

The main constituents of living matter are carbon compounds. Which of these compounds is not a carbon based compound that is important to life.

View Explanation

Log in for full answers

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糖是的一个例子，而 DNA 是。 Un azúcar es un ejemplo de , mientras que el ADN es un .