Hard Practice — Advanced Set

Hard Practice — Structure, Test & Base-pairing Reasoning

Reason from evidence to structure: reducing-sugar logic, glucose reactions (what each proves), base-pairing and melting-temperature arguments, and protein structure/enzyme logic.

• Free anomeric $-CHO$/$-C{=}O$ reduces Tollens'/Fehling'; sucrose is non-reducing.
• A-T (2 H-bonds), G-C (3 H-bonds) $\Rightarrow$ higher G-C content raises the DNA melting temperature.
• Denaturation loses 2$^\circ$/3$^\circ$ structure, not the peptide (1$^\circ$) sequence.