AUCET

All the candidates who have secured atleast 50% (45% for SC / ST candidates) marks in group subjects of the qualifying examination fulfill AUCET 2018 eligibility criteria for science course admissions. It may be noted that AUCET 2018 exam for science courses is mainly conducted for five papers:
Life sciences
Physical sciences
Mathematical sciences
Chemical sciences
Geology
Here are more details:
https://www.shiksha.com/university/andhra-university-visakhapatnam/exams/aucet

AUCET Syllabus 2018:
Andhra University prescribes elaborated AUCET syllabus for each paper. Please Check for AUCET 2018 syllabus for your subject from the link mentioned below:
https://www.shiksha.com/university/andhra-university-visakhapatnam/exams/aucet/syllabus

Andhra University prescribes elaborated AUCET syllabus for each paper. Please refer to the link provided below for details regarding prescribed syllabus for the AUCET entrance exam for each paper:
https://www.shiksha.com/university/Andhra-university-Visakhapatnam/exams/aucet/syllabus.

Yes, you are eligible for doing MA Psychology.

Yes, you are eligible for M.Sc in food, and dietetics.

Life Sciences
Physical Sciences
Mathematical Sciences
Chemical Sciences
Geology
Statistics
5-Year Integrated course in Geology & Applied Chemistry
Humanities & Social Sciences
English
Telugu
M.Com
MHRM
Economics.

No, I don't think it's possible. You could do certification courses in Biotechnology but for an MAC, you need to be a graduate in the same discipline.

Please check for your eligibility to appear for the AUCET exam from the criteria mentioned at the link provided below:
https://www.shiksha.com/university/Andhra-university-Visakhapatnam/exams/aucet.