Question Detail
Question
Which types of specialized sequences are carried at both ends of linear chromosomes for faithful DNA replication, aging and maintaining polarity?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Telomeres are the specialized, repetitive non-coding sequences found at the ends of linear eukaryotic chromosomes. They protect the chromosome ends from deterioration and from fusion with other chromosomes, solve the end-replication problem (preventing loss of genetic information), and are associated with cellular aging. Satellites are repetitive DNA used in DNA fingerprinting, organisers (NORs) are for nucleolus formation, and repetitive sequences are a broader category.
Hint
This structure prevents the loss of genetic information during DNA replication and is linked to cellular lifespan.