how to reply the email from professor? I want to say got it, but it seems not appropriate.
Can I just reply like, well noted with thanks or well received?
How to reply emails like this?

thanks in advance
EDIT----------------------------------
I work as the TA for the professor. So the usual cases are: 
1. he gives me an assignment and I want to reply 'I will do it right away'.
2. I ask him some questions about the assignment and he replies something. And I want to express 'yes, got it!'
He gives me an assignment and I want to reply 'I will do it right away'.


Then reply: "I will do it right away".

But if you're going to do it right away, you can probably wait replying until you have finished the assignment, if a reply in that case is expected.


  I ask him some questions about the assignment and he replies something. And I want to express 'yes, got it!'


Then reply: "Got it, thanks."

To sum up: as many students, you're overthinking all this.