Alfred, the science app, responds by explaining how enzymes work in relation to the ‘lock and key’ model. Alfred explains ... the topic and review the KS3 knowledge and understanding of ...

Effective models could unlock some of what is still unknown in biology and help your doctor find the right treatment.

Jacob Hanna, a stem cell biologist at the Weizmann Institute of Science, wanted to know why this transition occurs. To answer this question, Hanna and his team set out to develop an ex utero embryo ...