The chairman of the BBC Trust said allegations of sexual abuse by Sir Jimmy Savile could not be excused as behaviour from a time when "attitudes were different", and gave his backing to inquiries by police and the corporation.
Lord Patten told a business dinner in Cardiff on Monday night it was " no excuse to say 'that was then' in the 1960s, 70s and 80s, and attitudes were different then".
He told the Cardiff Business Club: "It's no excuse to say, 'I'm sure the same thing used to happen with pop groups and others at the time'. Those things may be true but they don't provide an excuse."
Around 40 women have come forward with allegations against Savile
BBC director-general George Entwistle yesterday apologised to victims of Savile's alleged sex abuse and pledged the corporation would hold its own inquiry following a police probe.
Lord Patten echoed Mr Entwistle's announcement and outlined how the BBC would act.
He said: "Immediately these allegations came out, we went to the police, we agreed with Acpo (Association of Chief Police Officers) the way we should handle this and they told us the police inquiry should come first and we shouldn't undertake our own investigation until there had been a police inquiry or we might get in the way of it.
"So there will be a full police inquiry and we will encourage people to co-operate with it, and when that is completed, we will then look at the issues which still remain to be resolved in a way which will have to command credibility in the wider community.
"Because the BBC exists above all on trust and the relationship between the wider public and the BBC itself. And when the BBC is at its best, it's not only because it is providing terrific, creative, challenging TV and radio, it is because the public think they own it and can identify with it. Just think of the Olympics, the torch, the cultural Olympiad - all of those helped bring the community together."
Two police forces investigated allegations against the entertainer in the past but no action was taken
Savile, the late radio and TV presenter, has been accused by a growing number of women of sexual abuse over a number of years.
Mr Entwistle, who started in his new role last month, spoke of deep regret about the ordeals of the women involved in the "awful allegations", and said there would be a "comprehensive examination" of what went on.
He spoke out a day after Prime Minister David Cameron called for the "truly shocking" allegations against Savile to be fully investigated.
Last week the BBC said it would work with police in examining the claims and on Friday Mr Entwistle wrote to staff urging them to come forward with information.
Speaking on BBC Radio 4's Today programme yesterday, he said: "These are awful allegations that have been made, and they are criminal allegations.
"And the first thing I want to say is that the women involved here have gone through something awful, something I deeply regret they should have to go through, and I would like to apologise on behalf of the organisation to each and every one of them for what they've had to endure here."
Mr Entwistle said any BBC inquiry would take place after police had conducted their investigations.
"When the police have finished everything they have to do, and when they give me an assurance that there is no danger of us in any way compromising or contaminating an investigation, I will take it further and ensure that any outstanding questions are answered properly," he said.
Any BBC probe, he added, would examine the "broad question of what was going and whether anybody around Jimmy Savile knew what was going on".
A growing number of women have come forward to claim they were either abused - many of them under-age - or that they saw others who were victims. A number of former colleagues have told how they were aware of rumours about the former Top Of The Pops presenter.
Unease about the claims has led to a number of memorials to the star being removed. Yesterday it was announced an inscription on the wall at Leeds Civic Hall in recognition of his charity work will be taken down.
A street sign in Scarborough, North Yorkshire, was also taken away in the past few days.
Mr Entwistle said Savile was widely regarded as a "bit peculiar", but he said if anyone had been directly aware of the allegations they should have spoken up.
Mr Entwistle said: "It's very important that people don't think the BBC of today is anything like in character managed the way it was at the time."
Former Radio 1 DJ Liz Kershaw told over the weekend how when she joined Radio 1 in 1987 - the year Savile left - his behaviour was an "open secret" at the station.
She described how she was routinely groped by another presenter as she was broadcasting.
Broadcaster Janet Street-Porter previously revealed that she was aware of rumours about the television and radio presenter's alleged abuse of under-age girls when she worked at the BBC in the late 1980s.
TV and radio presenter Sandi Toksvig revealed as she was reviewing the papers on the Andrew Marr show on Sunday how she was groped on air by a "famous individual" 30 years ago.
Ms Toksvig, who declined to name the celebrity, said when she informed other staff what had happened they thought it was funny.
Police child abuse officers have met BBC officials to discuss the allegations concerning Savile.
Officers said they were contacting all individuals who have made claims about the late presenter and should know how many reported victims there are some time this week.
See pictures of fans queuing in the rain to catch a glimpse of Savile's coffin
Auction of Sir Jimmy Savile's memorabilia