Q50 / 180 · COMEDK 2025 (10 May Shift 1) · Chemistry
Choose the incorrect statement.
- ADenaturation of protein is due to loss of both the secondary and tertiary structures of the protein.
- Correct answerBThe hormone Glucocorticoid controls the level of excretion of water and salts by the kidney.
- CVitamins A and K are fat soluble and are stored in the liver of human beings.
- DComplete hydrolysis of RNA gives Nitrogen containing bases, a pentose sugar and phosphoric acid.
Solution
Denaturation of proteins involves the loss of secondary and tertiary structures due to physical or chemical changes, while the primary structure remains intact. Thus, the statement regarding denaturation is correct.
Vitamins A, D, E, and K are fat-soluble vitamins and are stored in the liver and adipose tissues. Thus, the statement regarding vitamins is correct.
Complete hydrolysis of RNA yields a pentose sugar (ribose), phosphoric acid, and nitrogenous bases (adenine, guanine, cytosine, and uracil). Thus, the statement regarding RNA hydrolysis is correct.
Glucocorticoids are hormones involved in carbohydrate metabolism, immune response, and inflammation. The hormone that primarily controls the excretion of water and salts by the kidney is mineralocorticoid (specifically aldosterone), not glucocorticoid. Thus, the statement regarding glucocorticoid is incorrect.
Answer: The hormone Glucocorticoid controls the level of excretion of water and salts by the kidney.
Vitamins A, D, E, and K are fat-soluble vitamins and are stored in the liver and adipose tissues. Thus, the statement regarding vitamins is correct.
Complete hydrolysis of RNA yields a pentose sugar (ribose), phosphoric acid, and nitrogenous bases (adenine, guanine, cytosine, and uracil). Thus, the statement regarding RNA hydrolysis is correct.
Glucocorticoids are hormones involved in carbohydrate metabolism, immune response, and inflammation. The hormone that primarily controls the excretion of water and salts by the kidney is mineralocorticoid (specifically aldosterone), not glucocorticoid. Thus, the statement regarding glucocorticoid is incorrect.
Answer: The hormone Glucocorticoid controls the level of excretion of water and salts by the kidney.
Hence, the correct answer is option: 'B'.