Which of the following is not a characteristic of cancer...

Name: Problem 9, Chapter 16: Biology: The Dynamic Science
Uploaded: 2021-09-26T07:32:40-08:00
Duration: 34 s
Channel: Josee Pacheco
Description: Which of the following is not a characteristic of cancer cells? a. proto-oncogenes altered to become oncogenes b. the mutation of a suppressor gene that results in normal genes becoming inactive c. the mutation of the TP53 gene d. multistep progression e. amplification of growth factors and growth factor receptors

Which of the following is not a characteristic of cancer cells? a. proto-oncogenes altered to become oncogenes b. the mutation of a suppressor gene that results in normal genes becoming inactive c. the mutation of the TP53 gene d. multistep progression e. amplification of growth factors and growth factor receptors

Which of the following is not a characteristic of cancer cells?
a. proto-oncogenes altered to become oncogenes
b. the mutation of a suppressor gene that results in normal genes becoming inactive
c. the mutation of the TP53 gene
d. multistep progression
e. amplification of growth factors and growth factor receptors

Key Concepts

Oncogenes

Oncogenes are genes that, when mutated or aberrantly expressed, promote cell proliferation and survival. In normal cells, proto-oncogenes have controlled roles in growth and differentiation, but when altered into oncogenes they can drive uncontrolled cell division and contribute significantly to cancer development.

Tumor Suppressor Genes

Tumor suppressor genes normally function to inhibit cell division, repair DNA damage, and initiate apoptosis when necessary. When these genes are inactivated through mutations or deletions, cells lose important regulatory controls, allowing malignant cells to proliferate unchecked.

TP53

TP53 is one of the most important tumor suppressor genes, often referred to as the 'guardian of the genome'. It plays a critical role in maintaining genomic stability by regulating the cell cycle, DNA repair, and apoptosis, and its mutation is a common event in a variety of cancers.

Multistep Carcinogenesis

Multistep carcinogenesis describes the process by which a series of genetic and molecular changes accumulate over time, transforming a normal cell into a malignant one. This progression involves multiple stages, including the activation of oncogenes and the inactivation of tumor suppressor genes.

Gene Amplification

Gene amplification involves the increase in the number of copies of a gene, which can lead to the overexpression of growth factors or growth factor receptors. This overexpression enhances cell signaling pathways that promote uncontrolled proliferation, and it is a recognized mechanism by which cancer cells acquire a growth advantage.

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