No of course not. 
If that were the case then none of us would have a penny. It is impossible. Don't let anyone without a clue or a bitcoin tell you different. I'll prove it. Anyone want some bitcoin? Here is the public key, whoever gets it can have it.
https://blockchain.info/address/1Q1fDcqMBFYFi6Qd6JDnRnNsRLwHBKtqwq
I mean when you send some fraction to somebody else. It has to be some way because when you send a transaction, your public key is connected with the private key.If that were the case then none of us would have a penny. It is impossible. Don't let anyone without a clue or a bitcoin tell you different. I'll prove it. Anyone want some bitcoin? Here is the public key, whoever gets it can have it.
https://blockchain.info/address/1Q1fDcqMBFYFi6Qd6JDnRnNsRLwHBKtqwq