Question

Match the LIST-I with LIST-II. LIST-I: A. Metribuzin, B. Glyphosate, C. Sulfosulfuron, D. Clodinafop-propargyl. LIST-II: I. 5-enolpyruvyl shikimate-3-phosphate (EPSP) synthase inhibitor, II. Acetolactate synthase (ALS) inhibitor, III. Acetyl Co-enzyme A-carboxylase (ACCase) inhibitor, IV. Photosystem-II inhibitor.

• A. A-I, B-II, C-III, D-IV
• B. A-II, B-I, C-IV, D-III
• C. A-IV, B-I, C-II, D-III
• D. A-III, B-IV, C-I, D-II

Hint:

Glyphosate inhibits EPSP synthase, sulfosulfuron inhibits ALS, and clodinafop-propargyl inhibits ACCase.

Answer 1

The Correct Option is C

Concept:
Herbicides are classified according to their mode of action. Different herbicides inhibit different biochemical pathways in weeds.

Step 1: Metribuzin.
Metribuzin inhibits photosystem-II. \[ A\rightarrow IV \]

Step 2: Glyphosate.
Glyphosate inhibits EPSP synthase enzyme. \[ B\rightarrow I \]

Step 3: Sulfosulfuron.
Sulfosulfuron is an ALS inhibitor. \[ C\rightarrow II \]

Step 4: Clodinafop-propargyl.
Clodinafop-propargyl is an ACCase inhibitor. \[ D\rightarrow III \] Therefore: \[ A-IV,\ B-I,\ C-II,\ D-III \] \[ \therefore \text{Correct Answer is (C)} \]