Consider statements about human anatomy: 1. The brain is the control center of the nervous system. 2. The heart is the pump of the circulatory system. 3. The lungs are the organs of the respiratory system. Which are correct? MCQ with Answer and Explanation

Explanation:
BCG (Bacille Calmette-Guérin) is a live attenuated vaccine derived from Mycobacterium bovis, used to protect against tuberculosis, especially in children. DPT is for diphtheria, pertussis, tetanus; MMR for measles, mumps, rubella; OPV is oral polio vaccine. BCG is often administered at birth in endemic regions.

Explanation:
Isoelectric focusing (IEF) separates proteins in a pH gradient according to their isoelectric point (pI), the pH at which a protein has no net charge and stops migrating. SDS-PAGE separates by size, Western blotting detects specific proteins after separation, PCR amplifies DNA. IEF is often used in 2D gel electrophoresis.

Explanation:
Carbohydrates are the body's primary and most efficient source of energy, broken down into glucose to fuel cellular activities and physical exertion. Proteins are essential macronutrients composed of amino acids, crucial for the growth, maintenance, and repair of body tissues, as well as forming enzymes, hormones, and antibodies. Fats are essential macronutrients; they provide concentrated energy, are vital for cell membrane structure, aid in the absorption of fat-soluble vitamins, and provide essential fatty acids. They should not be entirely avoided. Thus, statements 1 and 2 are correct.