MBA Eligibility

Any UG graduate with 50% as well as CAT MAT . You must attend the IIBSAT exam or u can give GDPIi to get admission in a IIBS.

Yes you can, however getting a good rank in CAT, MAT etc are important and it would be e difficult for you to develop a base for the accounts subject

Yes, a B.Sc biotech student can pursue MBA (Finance). The eligibility criteria for the PGDM course in finance is a bachelor's degree with an aggregate of 50% and above and any management entrance exam.

MBA in UK mostly requires a work experience of 3 years, a valid GMAT and IELTS score. For additional requirements which differ with universities you must visit the university website itself. The tuition fee may range from INR15-INR40lacs a year or more. Remember that most MBA programs in UK are of 1 year hence the expenses come down considerably. Scholarships again are merit-based. Apart from your academic qualification and grades, your work experience, achievement, GMAT scores etc will be counted. So, it is competitive. You can also check British Chevening scholarships for studying in UK.
Best Wishes

Yes, you are eligible for the same.

No, you can't be eligible because MBA is full time course and you just have to come college for 4 hours. So you can do anything in remaining hours.

you will be eligible once you are through with the backlog. you need to have the passing certificate or at least a letter from your college in case the passing certificate is delayed . The backlog is not a major issue once you have a graduation certificate . you are eligible for pursuing . just make sure before you go for the interview for any MBA college you need to pass the undergrad without back logs

Yes they provide dedicated learning and Placement assistance opportunity and many companies come to recruit with good salary.
https://www.shiksha.com/Vgu-Vivekananda-Global-University-Jaipur-institute-college-listingoverviewtab-42525

Go for MBA. Because in MBA, you can get better job opportunities, higher packages and prestige also of MBA executive. You have maths also. So, MBA is better option. Best of luck !