Accepting CVs means that candidates can submit the same CV to various employers within the same job field, therefore many graduate recruiters do not accept them, but make their own application form instead. Online application forms usually take a while to complete, however you taking the time to complete it is an indicator of your commitment to the job. The application form is designed to give the employer key information about you and shows your personal qualities.
Competency-based questions are often used in online systems - such as a series of scenarios in which you have to explain what you would do if faced with a similar situation. They tend to look for your motivation and ability to do the job and there are usually questions about the company’s current affairs, so make sure you have done your research before starting. Give yourself time to compose your answers beforehand, in a Word document for example, and then you can check them over before submitting them. There is not usually a time limit for online applications.
My experience of doing a Nuffield Bursary encouraged me to do an MChem degree