After Reading the Paragraph Below, Answer the Questions That Follow

question 62

Multiple Choice

After reading the paragraph below, answer the questions that follow.
While DNA microarrays can be used to determine whether or not a gene is expressed in a cell, quantitative polymerase chain reaction (qPCR) can be used to measure the extent of gene expression in cells and tissues. To perform qPCR, mRNA is extracted from cells and reverse transcribed to complementary DNA (cDNA) . Using fluorescent DNA molecules that recognize specific gene sequences and DNA polymerase, copies of the gene sequence of interest are made. After the copies are made, a fluorescent detector measures the intensity of the fluorescent signal, which is proportional to the number of mRNA transcripts in the cell and corresponds to the level of gene expression in the cell.
-Which of the following statements regarding the comparison of DNA microarrays and qPCR is false?

• A)Both methods use fluorescent DNA molecules and cDNA.
• B)Both methods can determine whether a gene has been turned on or not.
• C)Both methods use mRNA extracted from cells.
• D)Both methods can quantify the levels of gene expression in cells.

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Definitions:

Interindustry Competition

Competition that occurs between firms in different industries, as opposed to intra-industry competition within the same industry.

Economies of Scale

Cost advantages reaped by companies when production becomes efficient, as the scale of operation increases.

Herfindahl Index

A measure of market concentration, calculated as the sum of the squares of the market shares of all firms within the industry.

Market Power

The ability of a firm or group of firms to manipulate the price or quantity of goods and services in the market, typically by restricting supply to influence prices to their advantage.