Following are the important steps involved in the process of decomposition:
A. Catabolism
B. Mineralisation
C. Humification
D. Leaching
E. Fragmentation
Choose the correct sequence of steps in the process of decomposition, from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → E → D → A → C → B
Decomposition begins with fragmentation (E) by detritivores, then leaching (D) of soluble nutrients, catabolism (A) by bacterial and fungal enzymes, humification (C) and finally mineralisation (B).
Note: A similar question was also asked in CUET (UG) 2026 on 31-05-2026 (Slot 2) and on 26-05-2026 (Slot 1).
NCERT Extract:
Decomposition – “… Similarly, decomposers break down complex organic matter into inorganic substances like carbon dioxide, water and nutrients and the process is called decomposition. Dead plant remains such as leaves, bark, flowers and dead remains of animals, including fecal matter, constitute detritus, which is the raw material for decomposition. The important steps in the process of decomposition are fragmentation, leaching, catabolism, humification and mineralisation.”