It can, if the core duties are genuinely biological and the applicant's degree matches, even where the role also involves adjacent technical work. The key is the actual balance of duties, confirmed in writing, rather than the research post's general title.
Weigh the actual duty balance
Ask the hiring organization to quantify, even roughly, how much of the role is biological research versus other technical support. A role where biology is a minor supporting function alongside a primarily different discipline may not fit the category well, regardless of the applicant's background. Where biology is clearly the core, adjacent tasks are less likely to undermine the match.
Ask for a rough percentage split of the working week, task by task, and get it from the person who will supervise the role. A number, even an approximate one, moves the conversation from impressions to evidence. Where biology is clearly the core and the adjacent work supports it, the match is easier to present; where biology is a minority function inside a primarily different discipline, the position may not fit the category however strong the applicant's background.
TN requires the position itself to fall within a listed profession and the applicant to hold the qualification for it, so a strong candidate cannot rescue a position that sits outside the list.