Which Statement Concerning the Twenty Different α-Amino Acids Widely Found

question 22

Multiple Choice

Which statement concerning the twenty different α-amino acids widely found in nature is true?

• A) Each α-amino acid has a different number of carbon atoms.
• B) Each α-amino acid has one amino (−NH₂)group.
• C) Each α-amino acid has one carboxylic acid (−COOH)group.
• D) These α-amino acids differ in the R groups attached to the α-carbon.
• E) None of these α-amino acids are aromatic compounds.

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Definitions:

Naturalistic Observation

An observational study technique where individuals are examined within their natural settings, devoid of any interference from the investigator.

Cause-and-effect

A relationship in which one event (the cause) makes another event happen (the effect).

Case Study

An in-depth analysis of a single event, situation, or individual to explore and understand underlying principles or phenomena.

Descriptive Study

A type of research that aims to accurately describe characteristics or phenomena, without attempting to determine cause and effect.