Video Transcript. My name is Michael and I'm an artist. And I'm going to show you how to draw a husky. You want to start with the ears. Huskies have very alert ears, very tall ears. So, you want to start with the ear. And do the back and do the other ear. The ear is always kind of up tall. Then you start with the face.
Operon. Definition. noun, plural: operons. A group of genes or a segment of DNA that functions as a single transcription unit. It is comprised of an operator, a promoter, and one or more structural genes that are transcribed into one polycistronic mRNA.peron. Definition. noun, plural: operons. A group of genes or a segment of DNA that functions as a single transcription unit. It is comprised of an operator, a promoter, and one or more structural genes that are transcribed into one polycistronic mRNA.
- An operon is the entire stretch of DNA that includes the operator, the promoter, and the genes that they control. - The operon can be switched off by a protein repressor which prevents gene transcription by binding to the operator and blocking RNA polymerase. Almost all the cells in an organism are genetically identical. - Differences between cell types result from differential gene expression, the. expression of different genes by cells with the same genome. - Errors in gene expression can lead to diseases including cancer.