Biomolecules

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below

1. Statement I is true but Statement II is false
2. Statement I is false but Statement II is true
3. Both Statement I and Statement II are true
4. Both Statement I and Statement II are false

Answer

(3) Both Statement I and Statement II are true

Solution

Concept: in alkali (Tollens' reagent) a ketose shifts to an aldose through an enediol.

[figure]

∴ fructose ⇒ glucose and mannose ⇒ Statement II true.

The free –CHO reduces [Ag(NH3)2]+ to Ag ⇒ Statement I true.

Answer: (3)