A researcher has mapped the entire genome of an insect.She notices that the genome contains around a thousand copies of a particular DNA sequence.What is the most likely function of this DNA sequence?
A)The sequence most likely has no function.
B)Its function is to code for rRNA.
C)Its function is to provide antibiotic resistance.
D)Its function is to copy and move within the genome via an RNA intermediate.

Question

Quizplus · Accepted Answer

The presence of a thousand copies of a particular DNA sequence in an insect's genome suggests that the sequence is highly repetitive and likely serves a structural or functional role that requires multiple copies. Such sequences are often involved in the production of ribosomal RNA (rRNA), which is essential for protein synthesis in the cell. Ribosomes are made up of rRNA and proteins, and because cells need a large number of ribosomes to meet the protein synthesis demand, genes coding for rRNA are typically found in multiple copies throughout the genome.

A Researcher Has Mapped the Entire Genome of an Insect