Facebook protest groups against A-level exams taken this week have spread - with complaints about a biology paper from another exam board.

The AQA biology exam taken on Monday prompted an instant online protest with claims that the questions were unfair.

Another protest on the social networking website is now raising concerns about an OCR A-level biology also taken on Monday.

The Ofqual qualifications watchdog has called for a report on the concerns.

Students complaining about the two biology exams have expressed fears that they will miss out on university places.

These include students hoping to study medicine and dentistry, who are anxious that dropping a grade will damage their career ambitions.

They have claimed that the questions did not match the course that they had studied.

The OCR exam board says it is not aware of any problems with the biology paper - but a spokeswoman says if candidates have any concerns they should raise them with their exam centres.

On Tuesday, the AQA exam board had promised that the marking and grading process would take into the concerns being raised by candidates.

Both of these exam papers are new specifications being taken for the first time - and thousands of pupils taking them have left angry messages on Facebook and other websites.

"How are we meant to get the required grade for uni when they don't even ask us relevant questions," asked a student in a Facebook group, with more than 2,500 members, complaining about the OCR biology.

"I've spent six months working hard... and only one out of the eight questions had any relevance," writes one student about the AQA exam, in a Facebook group with more than 9,000 members.