McGraw-Hill Education has posted in YouTube a quite impressive collection of animtions, covering many aspects of biochemistry, molecular biology, genetics, immunology, microbiology and related subjects. Glycolysis, replication, transport across the membrane and DNA sequencing - these are just a few of covered topics. In total, there are 335 animations, related to biology and medicine to choose from! Very useful material for basic level biology and medicine students, struggling with Krebs cyle, transcriptional regulation or other similar problems (Source: FEBS Network).

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