39. Eukaryotic genome is much less compact than the genome of prokaryotes. Eukaryotes, but not prokaryotes, have B A. a large proportion of DNA that is never expressed B. introns, some of which are bigger than the gene they interrupt C. short sequence of nucleotides that may repeat thousands of times D. All of the listed responses are correct E. None of the listed responses are correct
Question
- Eukaryotic genome is much less compact than the genome of prokaryotes. Eukaryotes, but not prokaryotes, have B A. a large proportion of DNA that is never expressed B. introns, some of which are bigger than the gene they interrupt C. short sequence of nucleotides that may repeat thousands of times D. All of the listed responses are correct E. None of the listed responses are correct
Solution
The correct answer is D. All of the listed responses are correct.
Here's why:
A. Eukaryotes do have a large proportion of DNA that is never expressed. This is often referred to as "junk DNA," although this term is somewhat misleading as this DNA can have other functions, such as regulation of gene expression.
B. Eukaryotes have introns, which are non-coding sections of a gene. These introns can indeed be larger than the coding sections (exons) they interrupt. Prokaryotes, on the other hand, typically have genes that are continuous and without introns.
C. Eukaryotes also have short sequences of nucleotides that can repeat thousands of times. These are known as tandem repeats and can be found in both coding and non-coding regions of the genome.
So, all of the listed responses are characteristics of eukaryotic genomes that make them less compact than prokaryotic genomes.
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