Choose the correct answer from the alternatives given. An eukaryotic chromosome differs from a bacterial chromosome in having
A
reverse transcriptase
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B
introns
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C
start and stop signals
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D
thymine instead of uracil
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Solution
The correct option is B introns In some genes, not all parts of DNA that are transcribed is used to form proteins. These regions are called introns. The introns are non-coding sections of an RNA transcript. These regions are spliced off in post-transcriptional modifications. These introns are very long sequences present in eukaryotic chromosomes while absent in bacterial chromosome. The sequences that code for proteins are called exons.