Question

The addition of which of the following to high-methoxyl pectin will result in gel formation?

• A. ( {Calcium ions} )
• B. ( {Hydrogen ions} )
• C. ( {Sodium ions} )
• D. ( {Sugar} )

Hint:

High-methoxyl pectin requires both acidic conditions and high sugar concentration for effective gel formation, commonly used in jams and jellies.

Answer 1

The Correct Option is B

High-methoxyl pectin requires the presence of hydrogen ions and sugar for gel formation. Here's why: - Hydrogen Ions: These lower the pH to the optimal range (usually between 2.8 and 3.6), which is necessary for high-methoxyl pectin to form a gel. The acidic environment reduces the negative charge on the pectin molecules, allowing them to come closer and interact. - Sugar: Sugar acts as a dehydrating agent by binding water molecules, which promotes gel network formation by increasing the concentration of pectin molecules and facilitating hydrogen bonding. Other options: - Calcium Ions (A): Calcium ions are crucial for low-methoxyl pectin gelation but not for high-methoxyl pectin. - Sodium Ions (C): Sodium ions do not play a significant role in the gelation of either type of pectin.