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#UV absorbance

3 public questions tagged with this topic.

Amino Acids Structure

At what wavelength does phenylalanine show maximum UV absorbance?

258 nm is the scientifically accurate answer to this question. Within the study of Amino_Acids_Structure, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of 258 nm directly address what is being asked. Among the other options, 274 nm, 280 nm, and 310 nm do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.

Ref: Campbell Biology, Urry et al., 12th Ed.

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DNA

The hyperchromic effect of DNA is due to:

Unstacking of bases correctly describes the effect or change asked about in this question. In DNA, understanding cause-and-effect relationships is essential for predicting biological outcomes. Unstacking of bases occurs because of specific molecular interactions, thermodynamic principles, or regulatory mechanisms that govern this biological process. The other options (Loss of phosphodiester bonds, Increase in viscosity, and Change in sugar puckering) describe either opposite effects, effects that occur under different conditions, or changes associated with unrelated processes.

Ref: Molecular Biology of the Gene, Watson et al., 7th Ed.

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DNA

What happens to UV absorbance when DNA denatures?

Increases correctly describes the effect or change asked about in this question. In DNA, understanding cause-and-effect relationships is essential for predicting biological outcomes. Increases occurs because of specific molecular interactions, thermodynamic principles, or regulatory mechanisms that govern this biological process. The other options (Decreases, Remains the same, and Shifts to higher wavelengths) describe either opposite effects, effects that occur under different conditions, or changes associated with unrelated processes.

Ref: Molecular Biology of the Gene, Watson et al., 7th Ed.

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