Discussion
DNA is NOT present in which one of the following ?
Answer: B
DNA is not present in Tobacco Mosaic Virus (TMV).
TMV is a rod-shaped plant virus whose genome is a single strand of positive-sense RNA, about 6,400 nucleotides long, wrapped in a helical coat of identical protein subunits. Fraenkel-Conrat's reconstitution experiments with TMV showed that RNA can be genetic material.
The others contain DNA. Bacteriophage T4 and adenovirus both have double-stranded DNA genomes, and chloroplasts carry their own circular DNA, about 120 to 160 kilobase pairs, which encodes the large subunit of RuBisCO among other genes.
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