If you want to be able to work in a lab under the direction of a Ph.D., then a Bachelors degree would be enough, although master’s degree would make you more marketable and give you experience having your own research project, working in a lab, etc.

One thing you might want to consider is how much you want to be in the lab performing the experiments. If my experience, Ph.D.s running the lab spend very little time (if any) in the lab performing experiments. It’s mostly the technicians and post-docs performing experiments. As the scientist running the lab, you will spend most of your time designing the experiments, writing grants to try and fund your projects, writing manuscripts to be published and working on presentations.

Hope that helps.