Multidrug Resistance in Tumor Cells Is

question 22

Multiple Choice

Multidrug resistance in tumor cells is

• A) due to the action of a membrane pump that transports small molecules out of the cells.
• B) the development of resistance to several drugs following an initial resistance to a single drug.
• C) caused by a mutation in the cystic fibrosis gene.
• D) due to the action of a membrane pump that transports small molecules out of the cells and the development of resistance to several drugs following an initial resistance to a single drug.
• E) All of the answers are correct.

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Definitions:

Variable Costs

Costs that change in proportion to the business activity or production levels, including raw materials and hourly labor.

Revenues

The total income generated by a company from its business activities before any expenses are subtracted.

Produce

In economic terms, it refers to creating goods or providing services as the result of a process of production.

Total Cost

The complete cost of production that includes both variable and fixed costs. It represents the total economic expenses incurred in the process of producing or offering a service.