All of the Following Are Reasons for Classifying Viruses in the Three

question 30

Multiple Choice

All of the following are reasons for classifying viruses in the three domains and not in a fourth domain except

• A) Viruses direct anabolic pathways of host cells.
• B) Viruses are not composed of cells.
• C) Some viruses can incorporate their genome into a host's genome.
• D) Viruses are obligate parasites.
• E) None of the above.

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Definitions:

Monosaccharides

Simple sugars that are the most basic units of carbohydrates, with a single polyhydroxy aldehyde or ketone unit.

Kiliani-Fischer Chain Lengthening

A chemical reaction that increases the carbon chain length of aldoses by one carbon atom using cyanohydrin formation.

Optical Activity

The ability of a compound to rotate the plane of polarized light, indicating its chiral nature.

Adenosine Monophosphate

A nucleotide composed of an adenine base attached to a ribose sugar and single phosphate group; involved in energy transfer within cells.