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Byju's Answer
Standard XII
Biology
What is Pleiotropy?
In both stran...
Question
In both strands, DNA is synthesized in 5' to 3' direction but lagging or Okazaki fragments explain its synthesis in 3' to 5' direction. Wha is the meaning of this line?
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Q.
Okazaki fragments are short, newly synthesised DNA fragments that are formed on the lagging template strand. When does this happen?
Q.
Which among the following statements is/are correct?
Statement 1: In the double-stranded DNA, only one strand serves as a template for the duplication of the new DNA.
Statement 2: Leading strand is continuously synthesised in 5’-3’ direction and lagging strand is discontinuously synthesised in 3’-5’ direction.
Statement 3: DNA polymerase reads the template strand in 5’-3’ direction.
Statement 4: Replication proceeds only in 5’-3’ direction
Choose the correct option
Q.
Assertion :Synthesis of daughter or new strand occurs continuously along the parent 3
→
5 strand. Reason: DNA polymerase can polymerise nucleotides in 3
→
5 direction on 5
→
3 strand.
Q.
Which of the following differences are incorrect between leading and lagging strands of DNA?
Leading strand
Lagging strand
(i)
It does not require DNA ligase for its growth
DNA ligase is required for joining Okazaki
(ii)
Formation of leading strand is slower
Formation of lagging strand is quite rapid.
(iii)
Its template opens in in 5 // 3 direction
Its template opens in 3 // 5 direction.
(iv)
Formation of leading strand begins immediately at the beginning of replication.
Formation of lagging strand begins a bit later than that of leading strand
Q.
In DNA replication, the Okazaki fragments on the lagging strand are joined together by
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