Which one of the following statements is correct?

Question

Identify linear polymer from following

Answer 1

To determine the correct statement from the given options, we need to analyze each one based on our understanding of chemistry and human physiology.

Statement 1: "All enzymes that utilise ATP in phosphate transfer require Ca as the cofactor"
- This statement is incorrect as not all enzymes that transfer phosphate groups from ATP require calcium (Ca) as a cofactor. Many enzymes use magnesium (Mg) instead. For example, kinases, which are enzymes that transfer phosphate groups, universally require magnesium as their cofactor.
Statement 2: "The bone in the human body is an inert and unchanging substance"
- This statement is incorrect. Bones are dynamic tissues that are constantly being remodeled through the processes of resorption and formation. Osteoclasts break down bone tissue, while osteoblasts build new tissue, allowing bones to adapt to stress and repair themselves.
Statement 3: "The daily requirement of Mg and Ca in the human body is estimated to be 0.2-0.3 g"
- This statement is misleading. The daily requirement of calcium for adults is typically around 1 gram (1000 mg), while that for magnesium is about 400-420 mg for men and 310-320 mg for women. This value can vary based on age, gender, and specific health needs.
Statement 4: "Mg plays roles in neuromuscular function and interneuronal transmission"
- This statement is correct. Magnesium plays a critical role in numerous physiological functions, including neuromuscular conduction and the transmission of electrical impulses between neurons. It acts as a cofactor for many enzymes involved in these processes.

Therefore, the correct statement from the given options is: Mg plays roles in neuromuscular function and interneuronal transmission.

Answer 2

To determine the correct statement from the given options, we need to analyze each one based on our understanding of chemistry and human physiology.

Statement 1: "All enzymes that utilise ATP in phosphate transfer require Ca as the cofactor"
- This statement is incorrect as not all enzymes that transfer phosphate groups from ATP require calcium (Ca) as a cofactor. Many enzymes use magnesium (Mg) instead. For example, kinases, which are enzymes that transfer phosphate groups, universally require magnesium as their cofactor.
Statement 2: "The bone in the human body is an inert and unchanging substance"
- This statement is incorrect. Bones are dynamic tissues that are constantly being remodeled through the processes of resorption and formation. Osteoclasts break down bone tissue, while osteoblasts build new tissue, allowing bones to adapt to stress and repair themselves.
Statement 3: "The daily requirement of Mg and Ca in the human body is estimated to be 0.2-0.3 g"
- This statement is misleading. The daily requirement of calcium for adults is typically around 1 gram (1000 mg), while that for magnesium is about 400-420 mg for men and 310-320 mg for women. This value can vary based on age, gender, and specific health needs.
Statement 4: "Mg plays roles in neuromuscular function and interneuronal transmission"
- This statement is correct. Magnesium plays a critical role in numerous physiological functions, including neuromuscular conduction and the transmission of electrical impulses between neurons. It acts as a cofactor for many enzymes involved in these processes.

Therefore, the correct statement from the given options is: Mg plays roles in neuromuscular function and interneuronal transmission.

The Correct Option is D