The protein responsible for muscle contraction are: MCQ with Answer and Explanation

Explanation:
Osmotic pressure (OP) is a colligative property of a solution, meaning it depends on the number of solute particles dissolved in a given volume of solvent, not on the nature or size of the particles. It is defined as the hydrostatic pressure that must be applied to a solution to prevent the net flow of water (osmosis) into the solution across a semipermeable membrane. According to the van't Hoff equation, osmotic pressure is directly proportional to the molar concentration of solute particles and the absolute temperature. The more concentrated the solution, the higher its osmotic pressure.

Explanation:
Innate immunity is the non-specific defense mechanism present by birth, including physical barriers and phagocytes. Vaccination introduces antigens to stimulate the body's own antibody production, conferring artificial active immunity. Antibodies (immunoglobulins) are produced and secreted by B-lymphocytes (plasma cells), not T-lymphocytes, which are involved in cell-mediated immunity. Thus, statements 1 and 2 are correct.

Explanation:
Cellulose, a linear polymer of β-D-glucose units linked by β-1,4-glycosidic bonds, forms microfibrils that provide tensile strength to plant cell walls. Glycogen is animal storage, starch plant storage, chitin in fungi and arthropods. Cellulose is the most abundant organic polymer on Earth.