There would be no need for a teacher to stand in front of the class and give a lecture ever again. Students watch videos that introduce the concepts at home and then go to class to demonstrate their learning. Instead, they should learn at their own pace, moving on to the next lesson only when they have mastered the concept before it. Khan believes he is onto something in what he styles the "flipped classroom." In Khan's view, there is no need for students to be divided into grades by age. The vocabulary of DNA, including the two processes involved in the central dogma, transcription and translation, is discussed at (18:23).Teaching by night and reflecting on a subject by day is the way that Salman Khan sees education evolving in the age of online lectures.
You can watch a video about the central dogma and other concepts in this lesson at this link: (8:07). It is called the central dogma of molecular biology. In short:ĭiscovering this sequence of events was a major milestone in molecular biology. It carries the information from DNA in the nucleus to a ribosome in the cytoplasm and then helps assemble the protein. RNA is a small molecule that can squeeze through pores in the nuclear membrane. This nucleic acid is RNA, or ribonucleic acid.
How do the instructions in DNA get to the site of protein synthesis outside the nucleus? Another type of nucleic acid is responsible.
In eukaryotic cells, chromosomes always remain in the nucleus, but proteins are made at ribosomes in the cytoplasm. Instructions for making proteins with the correct sequence of amino acids are encoded in DNA.ĭNA is found in chromosomes. What determines a protein’s structure? It begins with the sequence of amino acids that make up the protein. Proteins, in turn, determine the structure and function of all yourcells. How can this organic molecule control your characteristics? DNA contains instructions for all the proteins your body makes. Your DNA, or deoxyribonucleic acid, contains the genes that determine who you are. I had already used the obvious word hypothesis in the sequence hypothesis, and in addition I wanted to suggest that this new assumption was more central and more powerful." And in his own words, "I called this idea the central dogma, for two reasons, I suspect.
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