Which vitamin can be synthesized by the human skin on exposure to sunlight? MCQ with Answer and Explanation

Explanation:
Glycogen is a highly branched polysaccharide of glucose, stored primarily in the liver and muscles. Starch is the plant equivalent. Cellulose is a structural polysaccharide in plants, chitin in arthropods and fungi. Glycogen can be rapidly mobilized to maintain blood glucose.

Explanation:
Antonie van Leeuwenhoek (1670s) constructed high-quality single-lens microscopes and was the first to observe bacteria, protozoa, sperm cells, and red blood cells, describing them as 'animalcules'. Hooke observed cells in cork. Pasteur disproved spontaneous generation, Lister introduced antiseptic surgery. Leeuwenhoek's pioneering work laid the foundation for microbiology.

Explanation:
The nomenclature for restriction enzymes is based on the genus, species, strain, and order of discovery of the source bacterium. In EcoRI: 'E' stands for the genus Escherichia, 'co' stands for the species coli, 'R' stands for the strain RY13, and 'I' indicates that it was the first restriction enzyme isolated from this particular strain. This systematic naming convention helps scientists identify the exact source of the enzyme.