Answer: 200 base pairs.
- A 50 base pairs
- B 100 base pairs
- C 1000 base pairs
- D 200 base pairs
Correct answer: D. 200 base pairs
Explanation: About 200 base pairs of DNA are associated with each nucleosome, wrapped around the positively charged histone octamer.
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.