This course designed to cover the basic understanding of unit conversions and solution preparation. Participants will learn concepts and calculations related to Mole fraction, Molarity, Normality, Percentage solutions (w/w,v/v,w/v), pH and buffers, numerical ability and other mathematical calculations useful in the biological sciences. The question Answers session for each topic will help participants to solve the questions of CSIR-NET, ICMR-JRF, GATE, CUCET, GAT-B etc.