You have two choices - either the MBA route or choose a Masters in any sub-stream in biotechnology and enhance your career prospects in pursuing a biotechnology based stream.
If you prefer the MBA route it would be a good idea to consult the Official MBA Guide.
The MBA is not like an MS degree that concentrates study in a single field and prepares students for high level staff or research positions. The MS typically requires an undergraduate education in the field in which you want the MS, or a closely related field. A finance major does not get an MS in chemistry, and a biology major does not get an MS in accounting.
MBA programmes accept students in any undergraduate field. They prefer students who do not have a business background because they give you the business training but they cannot provide the broad background that managers should have. I know people who have taught MBA students with degrees in Music, Medicine, Dentistry, Law. Psychology, Political Science, Chemistry, Biology, engineering, and many other fields.
Most MBA programmes prefer students with 2-3 years work experience after the first degree, but many accept students right out of college if they have good grades and a high GMAT score.
Some MBA programmes are designed specifically for new college graduates without work experience. MBAs with good grades are in high demand and they command good starting salaries. To find the MBA program that best fits your background, criteria and preferences, a good source of information is the Official MBA Guide, a free public service at http://officialmbaguide.org. You can use it to select programs in specific geographic regions, specific concentrations, or specific types of programs, such as full-time, part-time, executive, distance learning, and accelerated. You can specify criteria that are important to you and get a ranked list of programs that best fit those criteria.
You can use the Guide to contact schools of your choice, examine their data, visit their web site, and send them pre applications.
You can see lists of top 40 schools ranked by starting salaries of graduates, GMAT scores, and other criteria.