Question:
Electron transport inhibition in PS-II (Photosystem II) for herbicidal action is observed in
Electron transport inhibition in PS-II (Photosystem II) for herbicidal action is observed in
Show Hint
PS-II inhibitors:
- Triazines: Atrazine.
- Ureas: Diuron.
- Nitriles: Bromoxynil.
- All inhibit electron transport in PS-II.
- Triazines: Atrazine.
- Ureas: Diuron.
- Nitriles: Bromoxynil.
- All inhibit electron transport in PS-II.
Updated On: Aug 27, 2026
- Nitriles
- Ureas
- Triazines
- All the above
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of herbicide modes of action.
Step 2: Detailed Explanation:
Nitriles (A), Ureas (B), and Triazines (C) all inhibit electron transport in Photosystem II (PS-II).
They bind to the D1 protein in PS-II and block electron flow.
Thus, all three groups exhibit this mode of action.
Therefore, the correct answer is all the above.
Step 3: Final Answer:
Thus, electron transport inhibition in PS-II is observed in all the above, which corresponds to option (D).
[0.5cm]
This question tests knowledge of herbicide modes of action.
Step 2: Detailed Explanation:
Nitriles (A), Ureas (B), and Triazines (C) all inhibit electron transport in Photosystem II (PS-II).
They bind to the D1 protein in PS-II and block electron flow.
Thus, all three groups exhibit this mode of action.
Therefore, the correct answer is all the above.
Step 3: Final Answer:
Thus, electron transport inhibition in PS-II is observed in all the above, which corresponds to option (D).
[0.5cm]
Was this answer helpful?
0
0
Top ICAR AIEEA Agronomy Questions
- The causal organism of downy mildew of grapevine is .
- Match Chemicals with their Use.
Chemical Used as (A) Thiophanate-methyl (I) Weedicide (B) Atrazine (II) Insecticide (C) Fenamiphos (III) Fungicide (D) Afidopyropen (IV) Nematicide
Choose the correct answer from the options given below: - Arrange the following spores of black rust fungi in their I to IV spore stages.
(A) Basidiospore
(B) Uredospore
(C) Aeciospore
(D) Teliospore
Choose the correct answer from the options given below: - Given below are two statements:
Statement (I): According to response of length of day and night on the flowering of plants, they are classified as long day or short day plants.
Statement (II): Wheat and oat are long day plants.
In light of the above statements, choose the most appropriate answer from the options given below. - Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): A series of cellulolytic enzymes are employed in the wood degradation process by brown rot fungi.
Reason (R): Lignin is not degraded by these fungi, therefore, it has typical brown colour wood remains.
In light of the above statements, choose the most appropriate answer from the options given below.
View More Questions
Top ICAR AIEEA Weeds Questions
- Weed seed dispersal by ants is known as
- Statement A: 2,4-D should be applied in grain Sorghum when it attains a height of 10-30 cm.
Statement B: 2,4-D should be applied in wheat 18-25 days after sowing - Match List-I with List-II
- Read the following statements.
A) Orobanche is total stem parasite of tomato
B) Cuscuta campestris is total stem parasite of linseed
(C) Loranthus longiflorus is partial stem parasite of mango
D) Broom rape is obligate root parasite of mustard
Choose the correct answer from the options given below: - For weeds evolution, CSR refers to
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions