All the amino acids have an amino group and a carboxyl group attached to the same carbon atom, also known as:
Correct answer: C. Alpha carbon
- A. Central carbon
- B. Major carbon
- C. Alpha carbon
- D. Beta carbon
Explanation
The correct answer is alpha carbon. In amino acids, the alpha carbon is the central carbon atom to which the key functional groups-amino group (-NH2) and carboxyl group (-COOH)-are directly attached. The term 'alpha carbon' specifically refers to this position in the structure of amino acids. Other terms like 'central carbon' and 'major carbon' are not standard terms used to describe this feature. A 'beta carbon' refers to the second carbon atom in the chain, which is not directly attached to the amino or carboxyl groups.
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The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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