Cancerous Tumors May Develop from All of the Following EXCEPT

question 20

Multiple Choice

Cancerous tumors may develop from all of the following EXCEPT:

• A) mutations in several proto-oncogenes or tumor suppression genes.
• B) interactions among two or more oncogene products.
• C) simultaneous mutations in a proto-oncogene and both copies of a tumor suppression gene.
• D) overlapping growth-control mechanisms that when one is compromised by mutation, others take over.
• E) all are true.

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Definitions:

Lease Contract

A legal agreement in which one party rents property, services, or goods from another party for a specified period of time.

Commercial Impracticability

A legal doctrine that excuses a party from performing a contract when events have occurred making performance excessively difficult, expensive, or harmful.

Frustration of Purpose

A legal doctrine that allows parties to be relieved from their contractual obligations if an unforeseen event undermines the contract's original purpose.

Substantial Performance

Contract performance that occurs when nearly all the terms of the agreement have been met, there has been an honest effort to complete all the terms, and there has been no willful departure from the terms of the agreement.