Answer:
they are found outside the nucleus
overall, the cell cycle is the copying and division of a cell. It consists of 4 main parts: G1, S, G2, and M
Answer:
True
Explanation:
DNA packaging in chromatin and the modifications are fundamental to the genetic expression.
Structure and modifications of chromatin regulate DNA metabolic processes, including transcription, recombination, reparation, etc.
Modifications that affect the way in which the DNI is packaged and used, but do not affect DNI sequences, are known as epigenetic modifications, and different enzymes are in charge of them.
Modifications might function by interfering between nucleosomes contact, or interacting with effector, or translating proteins.
Effector proteins initiate biological responses such as the activation or repression of transcription.
Packaging in chromatin has a big influence on genetic transcription. Genetic expression requires transcription factors that, once joined to genes regulatory sequences, initiate modification cascades that result in a gene expression or silence. Some of the chromatin modifications have been associated with genic activation or repression.
All of the cells within a complex multi-cellular organism such as a human being contain the same DNA; however, the body of such an organism is clearly composed of many different types of cells.
<u>What, then, makes a liver cell different from a skin or muscle cell</u> is <em>the way each cell deploy (utilizes) its genome</em>. In other words, the particular combination of genes that are turned on (expressed) or turned off (repressed) dictates cellular morphology (shape) and function. This process of gene expression is <em>regulated by cues</em> from both within and outside cells, and the<em> interplay </em>between these cues and the genome <u>affects essentially all processes</u> that occur during embryonic development and adult life.
Outside/Environmental cues include small molecules, secreted proteins (growth factors or signaling molecules), temperature, and oxygen.
The signaling molecules trigger intercellular signaling cascades (series of chemical reactions) that ultimately cause semipermanent changes in expression of genes. Such changes in gene expression can include turning genes completely on or off.
This process is thought to regulate a vast number of cell behaviors, including cell fate decisions during embryogenesis, cell function, and chemotaxis (i.e. cell movement in response to concentration gradient of a particular substance.)
Answer: C
Explanation:
Bc i think it is n it’s affecting the community of bats