Which of these is found in amino acids?Group of answer choices–C=OR–NH2R–PO42R–OHR–COH

To determine which of the given options is found in amino acids, we need to analyze the structure of amino acids.

Breakdown of the Problem

1. Identification of Amino Acid Structure: Amino acids contain specific groups in their structure, namely an amine group (–NH2) and a carboxyl group (–COOH).
2. Examine the Options: We need to evaluate each choice provided.

Relevant Concepts

• Amino acids are organic compounds composed of carbon, hydrogen, oxygen, and nitrogen. The basic structure of an amino acid includes:
  • A central carbon atom (C)
  • An amine group (–NH2)
  • A carboxyl group (–COOH)
  • A hydrogen atom (–H)
  • A variable R group (side chain)

Analysis and Detail

The provided options are:

1. C=O
2. R–NH2
3. R–PO42
4. R–OH
5. R–COH

• C=O: This represents a carbonyl group (part of a functional group).
• R–NH2: This is the amine group; amino acids contain this group.
• R–PO42: This is a phosphate group; not found in standard amino acids.
• R–OH: This is a hydroxyl group; not standard in all amino acids.
• R–COH: This indicates an aldehyde group; not a defining feature of amino acids.

Verify and Summarize

Among the choices, only R–NH2 represents a functional group that is consistently found in all amino acids.

Final Answer

The correct option is R–NH2.