生物背景的转行做软件测试太亏了

Software QA is relatively to entry, yes, you can do it.
However, Software QA can only work in software company and it is very easy to be outsourced.
Considering the e long term career change, the are better directions you can go.

Oracle's earning is extremely good last quater even under such bad economy, why, because companies are using database.

生物背景+Database skill is in high demand. With your education and bio work experience + database skill, you will find job everywhere not only in software industry.