Q.19 Correctly match the following Product classes with their representative
Products.
Product class                           Product
P. Biofuel                               1. Cellulase
Q. Bioplastic                         2. Cephalosporin
R. Industrial enzyme         3. Butanol
S. Antibiotic                        4. Poly-lactic acid
5. Rituximab
(A) P-1; Q-5; R-3; S-2
(B) P-3; Q-4; R-5; S-2
(C) P-3; Q-2; R-1; S-5
(D) P-3; Q-4; R-1; S-2

The correct matching for product classes with their representatives is option (D) P-3, Q-4, R-1, S-2.​

Correct Matching

Biofuel (P) pairs with Butanol (3), a key bioalcohol produced via microbial fermentation as a renewable fuel alternative. Bioplastic (Q) matches Poly-lactic acid (4), a biodegradable polymer from lactic acid fermentation used in sustainable packaging. Industrial enzyme (R) corresponds to Cellulase (1), widely applied in biofuel production and textile industries for cellulose hydrolysis. Antibiotic (S) aligns with Cephalosporin (2), a beta-lactam antibiotic derived from fungal sources like Acremonium.​

Why Option (D)?

This option accurately reflects biotechnological classifications: Butanol exemplifies biofuels from ABE fermentation; PLA represents bioplastics due to its renewability and compostability; cellulase is a hallmark industrial enzyme in biomass processing; cephalosporin is a standard antibiotic class. GATE BT 2025 official solutions confirm this mapping through product applications and origins.​

Incorrect Options Explained

• (A) P-1, Q-5, R-3, S-2: Wrong as biofuel isn’t cellulase (an enzyme), bioplastic isn’t Rituximab (a monoclonal antibody for cancer therapy), and industrial enzyme isn’t butanol (a fuel).​

• (B) P-3, Q-4, R-5, S-2: Correct for P, Q, S but errs on R-5 since cellulase, not Rituximab, defines industrial enzymes; Rituximab is a therapeutic biologic.​

• (C) P-3, Q-2, R-1, S-5: Matches P and R correctly but mismatches Q (bioplastic ≠ cephalosporin antibiotic) and S (antibiotic ≠ Rituximab).​