Multiple Choice
Multigene families arise as a result of __________.
19. Genomics
Genomes
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What factor accounts most for the difference in genome size between vertebrates and prokaryotes?
A
Vertebrates have more protein-coding genes.
B
Vertebrates have longer and more complex upstream regulatory sequences.
C
Vertebrates have more genes for functional RNA molecules.
D
All of the listed responses are correct.
E
Vertebrates have more noncoding DNA sequences.
Verified step by step guidance1
Understand the difference in genome size between vertebrates and prokaryotes. Vertebrates generally have larger genomes compared to prokaryotes.
Consider the role of protein-coding genes. While vertebrates have more protein-coding genes, this does not account for the majority of the difference in genome size.
Examine the complexity of regulatory sequences. Vertebrates do have longer and more complex regulatory sequences, but this is not the primary factor for the larger genome size.
Evaluate the presence of functional RNA molecules. Although vertebrates have more genes for functional RNA molecules, this is not the main reason for the increased genome size.
Identify the primary factor: Vertebrates have significantly more noncoding DNA sequences, which contribute most to the difference in genome size between vertebrates and prokaryotes.
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