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.
Answer:
a thick, mucous secretion and active mitosis of epithelial cells
Explanation:
The mucous neck cells of gastric glands serve to secrete mucus. Mucus is a thick sticky secretion that is rich in protein and carbohydrates. Apart from lubricating the stomach lining, its layer serves to protect the cells of the stomach lining from HCl.
To maintain the integrity of the stomach lining, the wore out cells are replaced by the new cells. To serve the purpose, the epithelial cells of stomach lining undergo mitosis and produce new cells to replace the damaged cells.
The another name for food level is trophical level.
Is is the position of each organisms that occupies the food chain. From the bottom of the food chain called producers up to the peak of the food chain called Quaternary consumers.