What are reducing sugars?

Reducing sugars- The saccharides which reduce Fehling's solution and Tollen's reagent are called reducing sugars. It contains a group that can easily oxides the above reagents. All monosaccharides whether aldose or ketose are reducing sugars. It contains either α -hydroxy aldehyde or α -hydroxy ketones. They have cyclic hemiacetal or hemiketal or structure in equilibrium with open chain forming CHO or C = O group. These are capable of acting as reducing agent because it has a free aldehyde group or a free ketone group. For example- Maltose, galactose, glucose, and lactose

E M B I B E

NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 14 - Biomolecules>REVIEW EXERCISES>Q 23

MEDIUM

12th West Bengal Board

IMPORTANT

Earn 100

What are complementary bases? Draw structure to show hydrogen bonding between adenine and thymine and between guanine and cytosine.

Important Questions on Biomolecules

HARD

12th West Bengal Board

IMPORTANT

NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 14 - Biomolecules>REVIEW EXERCISES>Q 24

What is the melting temperature ( $T_{m}$ ) of DNA? A DNA molecule with more number of G-C base pairs than A-T base pairs, has higher $T_{m}$ than the one with lesser number of G-C base pairs than A-T base pairs. Explain why?