Which of the following statements about cancer is false? (a)...

Which of the following statements about cancer is false? (a) oncogenes arise from mutations in proto-oncogenes (b) tumor suppressor genes normally interact with growth inhibiting factors to block cell division (c) more than 120 cancer-driving genes have been discovered (d) oncogenes were first discovered in mouse models for cancer (e) the development of cancer is usually a multistep process involving both oncogenes and mutated tumor suppressor genes

Which of the following statements about cancer is false?
(a) oncogenes arise from mutations in proto-oncogenes
(b) tumor suppressor genes normally interact with growth inhibiting factors to block cell division (c) more than 120 cancer-driving genes have been discovered (d) oncogenes were first discovered in mouse models for cancer (e) the development of cancer is usually a multistep process involving both oncogenes and mutated tumor suppressor genes

Key Concepts

Multistep Process of Carcinogenesis

The multistep process of carcinogenesis refers to the complex series of genetic and epigenetic changes that transform a normal cell into a cancerous one. This process involves multiple events, including the activation of oncogenes and the inactivation of tumor suppressor genes.

Animal Models in Cancer Research

Animal models, particularly mouse models, are widely used in cancer research to study the mechanisms of cancer development, test hypotheses about oncogenes and tumor suppressor genes, and evaluate potential treatments. These models have contributed significantly to our understanding of cancer biology.

Tumor Suppressor Genes

Tumor suppressor genes are a class of genes that regulate cell division, repair DNA mistakes, and ensure apoptosis of damaged cells. Mutations in these genes can lead to a loss of growth control, contributing to the initiation and progression of cancer.

Proto-oncogenes

Proto-oncogenes are normal genes that play crucial roles in cell signaling, growth, and division. When these genes undergo mutations or are dysregulated, they can transform into oncogenes, leading to uncontrolled cell proliferation.

Oncogenes

Oncogenes are genes that, when altered by mutation or increased expression, can promote cell proliferation and contribute to cancer development. They typically originate from proto-oncogenes, which are normal genes involved in cell growth and division.

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