Dear Teja, if you are looking for Syllabus for IISER, here you go:

Biology syllabus is: Diversity in the living world, Structural organisation in the animals and plants, Human Physiology, Reproduction, Cell Structure and Function, Plant Physiology, Genetics and Evolution, Biology and Human welfare, Biotechnology and its application, Ecology and Environment. 

Physics and Chemistry syllabus are common for Mathemativs and Biology students. You can check that at our page: https://engineering-careers360-com.cdn.ampproject.org/v/s/engineering.careers360.com/articles/iiser-admission/amp?amp_js_v=a2&amp_gsa=1&usqp=mq331AQCCAE%3D#referrer=https%3A%2F%2Fwww.google.com&amp_tf=From%20%251%24s&ampshare=https%3A%2F%2Fengineering.careers360.com%2Farticles%2Fiiser-admission