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The distinguishing factors between the D and L forms of sugars are primarily attributed to which of the following?
The specific conformation of the carbon atom to which the functional group is attached.
The precise arrangement of H and OH groups around the penultimate carbon.
Whether the plane of polarized light rotates to the left (levorotatory) for the L form or to the right (dextrorotatory) for the D form.
The unique configuration of H and OH groups at the terminal carbon atom.
Answers (1)
The distinguishing factors between the D and L forms of sugars are primarily based on whether the plane of polarized light rotates to the left (levorotatory) for the L form or to the right (dextrorotatory) for the D form. This phenomenon is associated with the chiral nature of sugars, where they exist as mirror images of each other. The specific conformation of the carbon atom to which the functional group is attached and the arrangement of H and OH groups around the penultimate carbon are secondary considerations but are not the primary factors that differentiate the D and L forms. The configuration of H and OH groups at the terminal carbon atom is not directly related to the D and L forms of sugars.
Hence, the correct answer is option 3.
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