MBBS

Yes. you can do marine biology even after completing MBBS as long as you have a BSc with minimum 55% in Marine Biology, zoology, botany, biochemistry, microbiology, biotechnology, fisheries, or aquaculture or fields related to it. And as far as admissions into related universities are concerned, you

There's nothing called direct application, you have to go through NEET councelling procedure in NTA. NEET. Nic. In then and only then you'll get an MBBS seat either it may be a government or Deemed colleges. You may try college prediction by Shiksha to know more about the colleges you can get.

It all depends on your rank. If you are unreserved, it may be difficult to get into government medical and dental colleges. State also depends. You may get admission in private colleges.

Academic Fees for MBBS course at Bara Hindu Rao Medical College is 2.25 lacs per annum. It is a 5.5 year course with 1 year of compulsory rotary internship.

No. The admissions are only based on NEET score. First of all, you need to have passed NEET UG entrance with cut off score. Then based on Kerala rank list and allotment, only admission in possible in private medical colleges in Kerala.

The admissions to medical colleges take place through NEET whether it's a private medical college or a government. And to qualify NEET you need to have secured atleast 50 percentile if you are in General category and further proceedings take place through the councelling process.

Admissions to medical colleges in India is through Neet whether it's a private or a government college and the cut off to qualify NEET is 50th percentile for General category students and the further proceedings take place through Councelling procedure.

CMC Vellore MBBS Cutoff ;
Unreserved. 50% ; SC/ST. 40% ; OBC. 40% ; Physically Handicapped (Unreserved). 45%.
ST/ SC/ OBC - PH: 40%
General - PWD: 45%
General: 50%

You may find this link helpful to your query
https://www.shiksha.com/college/christian-medical-college-hospital-ludhiana-22504/cutoff