When the rate of repair lags behind the rate of mutation, the possible fate of the cell is that (A) The cell can be transformed into a cancerous cell.
Mutations are the changes in the sequence of genes. If the rate of repair lags behind, there is a major possibility that the cell can turn into a cancerous one. This is because mutations are a big reason for the appearance of cancer.
A cancerous cell is the one that proliferates at an excessive rate. The most important property of cancerous cell is of metastasis. It is the movement of the tumor into different parts of the body and infect the healthy cells of that area as well.
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Answer:
it condenses the DNA so that it can fit inside the cell.
Explanation:
Supercoiling is a level of genome packaging and is important for the packaging of the DNA which is about 2m in length inside a nucleus that is about 6microm. Supercoiling refers to the over (positive supercoiling) or under winding (negative supercoiling) of a DNA strand, and is an expression of the strain on that strand. Supercoiling is in compacting DNA, and also allows for the regulation of access of transcriptional machinery and other biological activities to the DNA and in turn gene expression. Certain enzymes such as topoisomerases are able to change DNA topology to facilitate access of DNA replication or transcription.
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Explanation:
A combination of the Q wave, R wave and S wave, the “QRS complex” represents ventricular depolarization. Ventricular depolarization occurs in part via an accessory pathway (AP) directly connecting the atrium and ventricle and thus capable of conducting electrical impulses into the ventricle bypassing the AV-His Purkinje conduction system.This term can be confusing, as not all ECG leads contain all three of these waves; yet a “QRS complex” is said to be present regardless.
