Biomolecules practice focused on carbohydrates, proteins, enzymes, vitamins and nucleic acids. Every preview below comes from NeetVellum's live original bank—not an unverified PYQ reconstruction.
carbohydrates, proteins, enzymes, vitamins and nucleic acids.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 1 · difficulty 1/5
Which of the following vitamins is water-soluble?
A. Vitamin A (retinol)
B. Vitamin D (calciferol)
C. Vitamin E (tocopherol)
D. Vitamin C (ascorbic acid)
Example 2 · difficulty 2/5
An aqueous solution of glycine is placed in an electric field between two electrodes, with the pH adjusted exactly to its isoelectric point. What is observed?
A. Glycine migrates towards the cathode as a cation
B. Glycine does not migrate towards either electrode, existing largely as the dipolar ion ⁺H₃N–CH₂–COO⁻
C. Glycine migrates towards the anode as an anion
D. Glycine molecules condense to form the dipeptide glycylglycine
Example 3 · difficulty 2/5
Which one of the following carbohydrates will NOT give a silver mirror with Tollens' reagent?
A. Maltose
B. Lactose
C. Sucrose
D. Fructose
The evidence-first practice loop
1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
2. Attempt closed-bookExpose the concept or execution gap before rereading.
3. Repair and returnClassify the miss and re-practice after a delay.