hi,

see for microbiology entrance test, syllabus of entrance test is totally based on b.sc courses syllabus, some of the important topics you must study for entrance test is,

Microbial biochemistry - Biomolecules, Carbohydrates, Lipids, Amino acids, Proteins, Enzymes

Genetics

Organization of prokaryotic genome

Gene mutation

Nucleic acid

DNA replication

Genetic information flow - Mechanism of transcription, Genetic code, Translation

Gene regulation

Organization of genetic material

Basic strategies of genetic engineering and its application

the books you should follow is mention below,

Mastering Microbiology For All PG Entrance Exams and Academics

by Dr. Shivika J Sethi (Author), SIA Publishers & Distributors Pvt Ltd

hope it would help.