NEET 2026 (cancelled) · Question 147 · Class 11
Biomolecules
The following reaction depicts the activity of a particular class of enzymes: X Y | | C - C E X - Y + C = C (Substrate) (Product) (Product) Identify the enzyme 'E' from the following options:
- (A)Isomerases
- (B)Ligases
- (C)Transferases
- (D)Lyases
The NCERT line that answers it
Verbatim line**Lyases:** Enzymes that catalyse removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds.
- Chapter
- Biomolecules
- Section
- 9.8.5 Classification and Nomenclature of Enzymes
- Page
- 13
- Words matched
- 17 of 17
The answer appears as a continuous sentence in NCERT. This is that sentence.
How this line gives the answer
0, emb=1.0, combined=1.0). Verified: high — The span explicitly defines lyases as enzymes that catalyse removal of groups leaving double bonds, which directly matches the reaction shown in the question where a C-C single bond becomes a double bond after removal of X and Y.
We did this for 1,565 questions.
Every one traced to the exact sentence in NCERT that answers it, including 90% of the 2026 paper. Sit a mock on the real NEET 2027 computer interface and every mark you drop comes back with its line attached.
Question text is reproduced from the published NEET 2026 (cancelled) paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.