A Key Factor in the Evolution of Killer Strains of Influenza

question 60

Multiple Choice

A key factor in the evolution of killer strains of influenza is that they

• A) only have eight genes.
• B) have an RNA genome.
• C) contain reverse transcriptase.
• D) have a segmented genome.
• E) have a circular chromosome.

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Definitions:

Propagation Step

A phase in a chain-reaction mechanism where radicals generate new radicals, allowing the reaction to proceed in a series of subsequent steps.

Free Radical

Highly reactive atoms or molecules with unpaired electrons, involved in many chemical reactions, including those in biological systems.

Chlorination

A chemical reaction that introduces chlorine atoms into a molecule, often used for disinfection or organic synthesis.

Dichloromethane

A volatile organic compound with a formula CH2Cl2, commonly used as a solvent and in chemical synthesis.