Consider statements about vitamins: 1. Vitamin A is stored in the liver. 2. Vitamin B complex is water-soluble. 3. Excess Vitamin D is easily excreted. Which are correct? MCQ with Answer and Explanation

Explanation:
Lysosomes contain about 40 types of hydrolytic enzymes (hydrolases) like proteases, lipases, nucleases, glycosidases, which digest macromolecules. They function in acidic pH (5.0). Oxidoreductases catalyze oxidation-reduction, transferases transfer groups, isomerases catalyze isomerization. Lysosomes are involved in autophagy, phagocytosis, and programmed cell death. Their rupture leads to autolysis, hence called 'suicide bags'.

Explanation:
Vitamin K is a cofactor for γ-glutamyl carboxylase, which carboxylates glutamic acid in prothrombin and other factors, enabling calcium binding.

Explanation:
DNA polymerase catalyzes the formation of phosphodiester bonds between adjacent nucleotides, extending the new strand complementary to the template. Helicase unwinds DNA, ligase joins fragments, primase synthesizes RNA primer. In prokaryotes, DNA polymerase III is the main replicative enzyme.