Hi,

The MHT-CET is a 4.30 hours paper if a student wishes to write both biology and mathematics as his/her major subjects.

Mathematics - 1.30Hrs(100 questions)=> medical aspirants can leave this section

Biology - 1.30hrs(100 questions)=> Engineering aspirants can leave this section(optional)

Physics/chem-1.30Hrs(50 questions each)

This is the normal breakup of the exams. So,  you will have to give exam both maths and biology together without break. Hope this helps.