A Scientist Discovers a Virus Whose Genome Consists of an Unusual

question 27

Multiple Choice

A scientist discovers a virus whose genome consists of an unusual DNA strand from a virus.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.
• E)The experiment was contaminated with cockroach DNA.

Comprehend the mechanisms and examples of genetic drift, specifically founder effects.

Grasp the characteristics and implications of specific genetic disorders, such as sickle-cell anemia.

Recognize the genetic similarities and differences between humans and chimps.

Understand the definition and biological importance of fitness in evolutionary terms.

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Definitions:

Positivism

The idea that phenomena are governed by, and can be explained by, rules based on objective observation and generalizations from those observations.

Explanation

An attempt to account for the relationships observed among phenomena. A basic goal of communications research is to explain how and why communication phenomena occur.

Two-tailed Hypothesis

A type of hypothesis that predicts either an increase or decrease in outcomes, requiring evidence for significant change in either direction.

Closed-ended Research

Research methodology that uses predefined responses to questions, allowing for easy quantification of data.