In an Experiment Designed to Analyze the MRNAs Present in a Cell

question 13

Multiple Choice

In an experiment designed to analyze the mRNAs present in a cell at a given time in the life cycle, it was found that about 50% of the mRNAs are of one type, less than 20% represent eight other mRNAs, and the rest consist of several thousand different mRNAs. What does this information indicate?

• A)Only the mRNA expressed at the highest level is of any importance to this cell type.
• B)The pattern of expression of the low-level mRNAs is what makes the cell type unique.
• C)The low-level expressed genes are from organelles.
• D)Those genes expressed at a low level are likely to be "housekeeping" genes found in many cell types.
• E)The genes most specific to this cell type and life stage are the 8 found at an intermediate level.

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