Question

Which of the following statements are correct about functions of essential plant nutrients?
(A) Nitrogen is an important component of nucleic acids.
(B) Phosphorus is essential to the formation of enzymes.
(C) Sulphur is part of some amino acids and coenzymes.
(D) Manganese is essential for pollen germination.
Choose the correct answer from the options given below:

• (A) and (D) only
• (A) and (C) only
• (B) and (C) only
• (A) and (C) only

Answer 1

The Correct Option is D

To determine which statements are correct about the functions of essential plant nutrients, let's analyze each statement:

• (A) Nitrogen is an important component of nucleic acids. This statement is correct because nitrogen is indeed a critical part of nucleic acids such as DNA and RNA, which are essential for genetic information and cellular functions.
• (B) Phosphorus is essential to the formation of enzymes. While phosphorus is vital for energy transfer (as in ATP) and as part of nucleic acids, it is not directly noted for being essential to the formation of enzymes, making this statement doubtful.
• (C) Sulphur is part of some amino acids and coenzymes. This statement is correct because sulfur is a component of the amino acids cysteine and methionine and also found in various coenzymes.
• (D) Manganese is essential for pollen germination. Manganese is involved in photosynthesis, nitrogen assimilation, and other physiological processes, but it is not specifically noted as being essential for pollen germination.

Based on the analysis, statements (A) and (C) are correct. Therefore, the correct answer is: (A) and (C) only.

Answer 2

The correct answer is (4) (B), (C), and (D) only.

Let’s review each statement:

(A) Nitrogen is not a component of nucleic acids: This statement is incorrect. Nitrogen is indeed a component of nucleic acids (DNA and RNA), as it is part of the nitrogenous bases (adenine, guanine, cytosine, thymine, and uracil). Therefore, (A) is incorrect.

(B) Potassium plays an important role in the activation of enzymes: This statement is correct. Potassium is essential for activating various enzymes, particularly those involved in protein synthesis and carbohydrate metabolism.

(C) Sulfur is part of some amino acids and coenzymes: This statement is correct. Sulfur is a component of amino acids like cysteine and methionine, and it is also present in coenzymes such as coenzyme A.

(D) Phosphorus deficiency results in terminal bud necrosis: This statement is correct. Phosphorus deficiency can lead to stunted growth, poor root development, and symptoms such as terminal bud necrosis (death of the growing tips).

Thus, the correct answer is (4) (B), (C), and (D) only.