Like DNA Microarrays,Northern Blots Analyze the Levels of MRNA

question 7

Multiple Choice

Like DNA microarrays,Northern blots analyze the levels of mRNA.However,Northern blots are almost always prepared with a probe tagged with one label,whereas DNA microarrays almost always use two groups of probes,each one tagged with a different fluorescent label.What advantage is conferred by using two labels for the microarray probes?

• A)The two labels increase the sensitivity of the microarray.
• B)The two labels allow the analysis of the expression of more genes.
• C)The two labels allow simultaneous assay of levels of DNA and RNA.
• D)The two labels allow comparison of gene expression between two samples.
• E)Probing the array with two labels is equivalent to doing two experiments at once.

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Definitions:

Periodic Inventory Systems

Periodic Inventory Systems is an inventory management method where inventory levels are updated and physical counts are conducted at specific intervals, typically at the end of an accounting period.

FIFO

An inventory valuation method (First In, First Out) where the oldest inventory items are recorded as sold first.

Weighted Average

A calculation that takes into account the varying degrees of importance of the numbers in a dataset, often used in inventory valuation and grading.

Lower-Of-Cost-Or-Market

An accounting principle that values inventory at the lower of its historical cost or market value, to comply with the conservatism principle.