It's not anything particular to a thesis presentation, but I've found that an acknowledgement slide is a solid last slide for the presentation. It's a choice that I've found rather common from experienced presenters (e.g. visiting professors when giving seminar talks.)
I agree with others in saying that slides with just "Any Questions" or "Thank You" isn't the best. They're rather content free, and such sentiments can be handled verbally. (Also, depending on how things are handled, your advisor or committee chair may be the one to open the floor for questions and select who asks the next question, in which case it may be slightly awkward if you've already opened the floor for questions.)
Instead, you can take the opportunity at the very end of your talk to thank and acknowledge the people who have helped you out. Generally this takes the form of a photo of your advisor's group, often with a list of names of others in your group, along with several columns of names pointing out any collaborators. It's also nice to point out in a corner any funding sources, if you received any grants or scholarships which supported the work. If you put their names up in writing you don't necessarily need to read out everyones name, but it is good to point out some of the key people and potentially mention their specific contribution.
One caution is to keep the amount of talking you do on your acknowledgment slide brief. I'd recommend a minute or so at most. Spend too long - particularly with a bland recitation of 20+ names - and you'll bore the audience. If you're going to name names, pick out just a few key people whose help you'd like to highlight. Err on the side of being too brief rather than too effusive. If you have individual names up, you can acknowledge in groups ("my collaborators in the Smith Group") rather than individually.
With an acknowledgement slide you have a rather "neutral" slide that clearly signals the end of the presentation, but contains a non-trivial amount of content in itself.
Note: You didn't mention which field you were in, so I gave an answer from my experience in biochemistry. Do keep in mind that presentation styles do vary somewhat from field to field. If it's not common in your field for experienced people giving seminars to present an acknowledgement slide, please ignore my answer and pick something that's more common to your field.