An Unidenti?ed Cell Was Found to Contain Introns and Exons

question 70

Multiple Choice

An unidenti?ed cell was found to contain introns and exons. It also expresses DNA polymerase and RNA polymerase. Although it exhibits a promoter region, it has no operons. You conclude that this cell _______.

• A) is eukaryotic
• B) is prokaryotic
• C) is either a prokaryotic or eukaryotic cell
• D) is actually a virus

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Definitions:

Spring Tide

A tide just after a new or full moon, when there is the greatest difference between high and low water.

Neap Tide

Lower-than-average high tides and higher-than-average low tides caused when the Sun’s gravity partially offsets the effects of the Moon’s gravity.

High Tide

The maximum height to which water in the ocean rises relative to the land in response to the gravitational pull of the Moon; also refers to the time when such high levels occur.

Low Tide

The lowest height to which water in the ocean drops relative to the land in response to the gravitational pull of the Moon; also refers to the time when such low levels occur.