国内临床医学硕士申请生物类博士考试

国内的临床医学本硕那种的硕士,想申请phD,但是熟悉的一个教授说需要参加一个exam,
If you would like to do this, you need to take an exam to proof that your knowledge and experience is equivalent to that of a biology student. This should not be understood literally. The exam can be done for a sub-topic such as physiology together with molecular biology. The intention is to make sure that the prospective PhD-Student got elementary training in scientific work.

这种是什么类型的exam?有没有人参加过?学校组织的吗?一种考试?怎么考?