Dembele scored from the penalty spot after McCrorie had fouled him in the second-half, meaning Dembele now has an impressive seven goals against Rangers since joining the Glasgow club less than 18 months ago.
"I believe we can cause any team in this country problems, problems when we have the ball but it is important we concentrate for the full 90 minutes and perform the complete game with and without the ball".
Scottish champions Celtic will now face Motherwell in the final on May 19.
"I'm frustrated, I didn't think we turned up in the first half", Murty said.
"If we do that I believe we have the opportunity to go and win the game, it is about making sure we get all of those factors right".
BJP MLA Sengar sent to 7-day CBI custody
The case came to light when the 17-year-old victim's father was arrested by the local police and later died while in custody. After massive public outrage over the inaction by the police, the case was finally handed over to the CBI on April 12.
The defending for Celtic's second goal was even worse, Russell Martin failing to clear Kieran Tierney's cross and instead presenting the ball to McGregor, who gladly dispatched it into the far corner of the net beyond the diving Wes Foderingham. We are in the final now and that won't be an easy game, either, that is a totally different game again with their physicality.
League Cup winners and Premiership leaders Celtic, who are trying to win successive domestic trebles, have met Rangers three times in the league this season with Celtic winning both of their trips to Ibrox and the other game at Celtic Park ending goalless.
"I would like to apologise for the first half".
"It takes a lot of personality and courage to take that kind of penalty but he was obviously confident that he was going to score". You can't get away from it.
"We just didn't get close to anyone, it took half an hour to make a tackle". Celtic, meanwhile, have welcomed several players back from layoffs and are also well equipped for the tie.