You have analyzed the DNA isolated from a newly discovered virus and found that its base composition is 32% A, 17% C, 32% G, and 19% T. What would be a reasonable explanation of this observation?
(a) The virus must be extraterrestrial
(b) In some viruses, double-stranded DNA is made up of base pairs containing two purines or two pyrimidines
(c) Some of the T was converted to C during the isolation procedure
(d) The genome of the phage is single-stranded not double-stranded

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