A Scientist Discovers a Virus Whose Genome Consists of an Unusual

question 51

Multiple Choice

A scientist discovers a virus whose genome consists of an unusual DNA strand.She finds the following percentage of bases: 23% A,12% T,30% G,and 35%C.Which of the following best explains these results?

• A)The bases are not purines or pyrimidines.
• B)Chargaff was wrong.
• C)Linus Pauling's model of DNA was correct.
• D)The DNA in this virus is single-stranded.

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Definitions:

Ea

Activation energy, the minimum amount of energy required to initiate a chemical reaction.

Endothermic

A reaction or process that absorbs energy from its surroundings, often in the form of heat.

Stability

The resistance of a chemical substance or compound to undergoing a change in its structure, properties, or composition over time or under certain conditions.

Kinetic Energy

The energy possessed by an object due to its motion, calculable as one-half the mass times the square of its velocity.