The analysis of the nitrogenous bases of the nucleic acid of a newly discovered virus showed 20% adenine, 40% guanine, 10% thymine, and 30% cytosine. The viral nucleic acid is most likely

A. double-stranded DNA.
B. single-stranded DNA.
C. double-stranded RNA.
D. single-stranded RNA.


Answer: B

Biology & Microbiology

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Which of the following is NOT found in every

nucleotide? a. ribose b. a phosphate group c. a single-ring base d. a double-ring base e. nitrogen

Biology & Microbiology

A group of men make an annual week-long hunting trip for deer season in West Virginia.  This year, they had to chase a family of squirrels out of the cabin, and during the week, they killed several deer and processed the meat, eating venison steaks most nights.  All of the men had a few mosquito bites, and two cases of beer were consumed.  The following week, they all developed symptoms of fever, headache, confusion, and seizures.  Which of the following organisms can be ruled out as the cause of this encephalitis?

A. JC Virus B. Eastern Equine Encephalitis Virus C. Jamestown Canyon Virus D. Powassan Virus

Biology & Microbiology

Which adaptation is constrained by the particular ancestral structure of the organism, resulting in a jury-rigged design?

A) antibiotic resistance in bacteria B) anatomy that allows upright posture in humans C) the wings of bats D) ethanol tolerance in fruit flies

Biology & Microbiology

Sitting at the top of a slide, a child has ________ energy; sliding down, she is using ________ energy

Fill in the blank(s) with correct word

Biology & Microbiology