Answer: Satellite DNA (VNTRs).
- A Coding exons
- B Satellite DNA (VNTRs)
- C Promoter sequences
- D tRNA genes
Correct answer: B. Satellite DNA (VNTRs)
Explanation: DNA fingerprinting exploits polymorphism in repetitive satellite DNA sequences called VNTRs (Variable Number of Tandem Repeats), which vary between individuals.
Helicase unwinds the double helix at the replication fork; one new strand (leading) is synthesised continuously toward the fork, while the other (lagging) must be made in short, separate Okazaki fragments because DNA polymerase only adds nucleotides 5'→3'.
Concept context
DNA structure, replication, transcription, translation, the genetic code, and gene regulation (lac operon). The single most important chapter for NEET molecular biology.