Question

Choose the correct answer from the alternatives given.
An eukaryotic chromosome differs from a bacterial chromosome in having

• A. reverse transcriptase
• B. introns
• C. start and stop signals
• D. thymine instead of uracil

Answer 1

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.

So, the correct option is 'introns'.