The enzyme that begins protein digestion in the stomach is: MCQ with Answer and Explanation

Explanation:
Diabetes mellitus is characterized by hyperglycemia due to insufficient insulin secretion (Type 1) or insulin resistance (Type 2). Diabetes insipidus is due to deficiency of ADH (vasopressin) affecting water reabsorption. Graves' disease is hyperthyroidism, Addison's is adrenal insufficiency. Insulin deficiency leads to inability of cells to uptake glucose.

Explanation:
Phosphorus is a primary macronutrient (along with nitrogen and potassium) required in relatively large amounts for nucleic acids, ATP, and phospholipids. Iron, zinc, and copper are micronutrients needed in trace amounts. Macronutrients include C, H, O, N, P, K, Ca, Mg, S. Micronutrients function as enzyme cofactors.

Explanation:
B-lymphocytes (B cells) differentiate into plasma cells that secrete antibodies, providing humoral immunity. T-lymphocytes (T cells) are responsible for cell-mediated immunity, directly attacking infected or cancerous cells. Vaccines are prophylactic; they stimulate the immune system to develop memory and prevent future infections, but they do not cure active, ongoing viral infections. Thus, statements 1 and 2 are correct.