The enzyme that breaks down lactose is: MCQ with Answer and Explanation

Explanation:
Innate (natural) immunity is the non-specific defense mechanism present from birth, including physical barriers like skin and chemical barriers like stomach acid. Acquired (adaptive) immunity is highly specific and develops after the body is exposed to a specific pathogen or antigen, involving the production of antibodies and memory cells. Vaccines provide artificial immunity (specifically, artificial active immunity), not natural immunity, which is acquired through actual infection or from mother to child. Thus, statements 1 and 2 are correct.

Explanation:
Apiculture involves the maintenance of honeybee colonies for honey, beeswax, and pollination services. Sericulture is silkworm rearing, pisciculture is fish farming, poultry is bird rearing for eggs/meat. The most common species in India is Apis indica (Indian bee) and Apis mellifera (European bee). Apiculture requires knowledge of bee biology, management of hives, and disease control.

Explanation:
RuBisCO (Ribulose-1,5-bisphosphate carboxylase/oxygenase) is the most abundant protein on Earth and the key enzyme in the Calvin cycle (C3 pathway). It catalyzes the fixation of CO2 by attaching it to Ribulose-1,5-bisphosphate (RuBP) to form a 6-carbon intermediate that immediately splits into two molecules of 3-PGA.