Adenosine triphosphate or ATP is a compound that stores and provides the energy required to perform a variety of biochemical processes in living beings.
After being consumed, it losses one or two of its phosphates and becomes adenosine diphosphate (ADP) or adenosine monophosphate (AMP).
It can also act as a coenzyme and be a precursor to DNA and ARN because it is a nucleic acid.
Each molecule of ATP is a nucleoside triphosphate, formed by an adenine (a nitrogenous base), a ribose (a sugar), and triphosphate.
This means the correct answer is A) nucleic acid
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.
Answer:
This happens because of our immune system. Our immune system keep record of every attacking microbe. It contains two type of while blood cells firstly is T cell that respond quickly to the attacking microbe. While secondly B cells that recognize those specific cells and fights them off. In addition to that B cells clones itself as memory cells for that disease and will remains in your body for years
