A couple of the methods of molecular biotechnology are cloning and recombinant DNA.
Answer:
False
Explanation:
The histones that are more positively charged, tight hardly to negatively charged DNA. So, enzymes, such as acetyltransferases, that reduce the positive charge of histones promote transcription.
Chromatin structure and its modifications can change the package of the DNA and consequently, alter the gene expression. The most common modifications of the chromatin are covalent modifications such as acetylation/deacetylation (by acetyltransferases and eacetylases), methylation (by methyltransferases), and phosphorylation (by kinases). This is the way of gene expression regulation.
The effects of modifications are different, for example methylation promotes condensation of the chromatin and as a consequence, prevents binding of transcription factors to the DNA (transcription is repressed).
Acetylation loosens the association between nucleosomes and DNA (because it neutralizes the positive charge of histones) and consequently promotes transcription. Deacetylation is a process opposite to acetylation.
Layers of fossils in pillars, the rock covering them is dated and we get an exact time of each layer.
<span>Insulin lispro is a mealtime insulin which is rapid-acting. Insulins are taken 15 minutes before or 15 minutes after. If a client is </span><span>scheduled to get a breakfast tray at 07:00, the client must receive a prescribed dose of insulin lispro at 6:45 or 7:15. </span>
