Protozoans, bacteria, fungi... viruses are not organisms
Attachment of acetyl groups to histone promotes transcription.
This mechanism is known as histone acetylation and it is a part of gene expression. The lysine residues inside the N-terminal tail from the histone core of the nucleosome are the substrate for enzymes-histone acetyltransferase which transfer an acetyl functional group from another molecule. Acetylation removes the positive charge on the histones and thus decrease the interaction negatively charged phosphate groups of DNA. As a result, chromatin becomes more relaxed structure and transcription is promoted.
A.<span>by separating the light of different wavelengths</span>
Answer:
When a star expands, the surface of the star becomes cooler as well as redder. Hence, forming the red giant.
Explanation:
If all the hydrogen which is present in a star gets fused into helium then an increase in the core temperature can be seen along with the core contractions. As a result of these core pressures and the core temperatures, the helium gets fused into carbon through a process known as the triple alpha process. As a result, the star begins to expand whereas its surface becomes cooler and redder which leads to the formation of red giant.
Heartburn is a burning discomfort that is generally felt in the chest just behind the breastbone. The burning sensation is caused when harsh stomach juices come in contact with and irritate the delicate lining of the esophagus.
