kittylover613
19.08.2019 •
Biology
Acetaminophen is a medication most commonly given for what purpose? as an antibiotic as an antihistamine as a pain reliever as an antiviral
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Ответ:
Ответ:
The correct answer is b a mutation in a gene that codes for protein regulating cell division.
Explanation:
In general, tumors occur when cells divide and grow excessively in the body. Normally, the body controls cell growth and division. New cells are created to replace older ones or to perform new functions. DNA Synthesis (S phase)
In many cancer cells the number of chromosomes is altered so that there are either too many or too few chromosomes in the cells. These cells are said to be aneuploid. Errors may occur during the DNA replication resulting in mutations and possibly the development of cancer. trumer develops when cells in the body divide and grow at an excessive rate. Typically, the body is able to balance cell growth and division. When old or damaged cells die, they are automatically replaced with new, healthy cells. In the case of tumors, dead cells remain and form a growth known as a tumor. Cancer is a disease that result due unregulated cell divison.There are many tumor suppressor protein present in our body such as retinoblastoma tumor suppressor protein,p53 protein.
These tumor suppressor protein helps to carry out cell divison in a regulated fashion and send signal for division only to that cell that have undamaged DNA.
Mutation in the gene encoding tumor suppressor protein leads to development of cancer.