Question
When identifying the 62 copies of PERVs, how did the investigators differentiate between viral DNA and the pig genome? Choose one: A. The viral sequence of nucleotides differs from the pig sequence. B. The viral complementary base pairs differ from the pig base pairs. C. The adenine, cytosine guanine, and thymine nucleotides are not used in viral DNA. D. The viral covalent bonds that attach one nucleotide to another differ from those found in pig DNA.
Answer
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Howard
Professional · Tutor for 6 years
Answer
A. The viral sequence of nucleotides differs from the pig sequence.
Explanation
## Step 1The problem is asking us to identify how the investigators could differentiate between viral DNA and the pig genome during their investigation. The options given suggest different ways this could be done.## Step 2Let's analyze each option:A. The viral sequence of nucleotides differs from the pig sequence.B. The viral complementary base pairs differ from the pig base pairs.C. The adenine, cytosine, guanine, and thymine nucleotides are not used in viral DNA.D. The viral covalent bonds that attach one nucleotide to another differ from those found in pig DNA.## Step 3The nucleotide sequences in both viral and pig DNA are composed of adenine, cytosine, guanine, and thymine. Therefore, option C can be eliminated.## Step 4Covalent bonds that attach one nucleotide to another are the same in all types of DNA, so option D can also be eliminated.## Step 5The sequence of nucleotides in viral DNA is unique to the virus, while the sequence in the pig genome is unique to the pig. This means that the sequence of nucleotides is the key difference between viral DNA and the pig genome.