BIOLOGY
STRUCTURE OF NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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repetitive sequences of DNA use din DNA profiling
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short sequences produced on the leading strand of DNA during replication
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short sequences produced on the lagging strand of DNA during replication
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short sequences of mRNA that are part of prokaryotic gene regulation
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Detailed explanation-1: -Okazaki fragments are the short lengths of DNA that are produced by the discontinuous replication of the lagging strand. The range of length of these fragments in the bacterial cells is about 1000-2000 nucleotides, while that in eukaryotic cells is approximately 100-200 nucleotides in length.
Detailed explanation-2: -These are short DNA nucleotide sequences are discontinuously synthesized and further associated by ligase enzyme which gives rise to the lagging strand at the time of DNA replication. They are formed in the lagging strand by the initiation of the creation of a new RNA primer by primo some.
Detailed explanation-3: -On the lagging strand, DNA synthesis restarts many times as the helix unwinds, resulting in many short fragments called “Okazaki fragments.” DNA ligase joins the Okazaki fragments together into a single DNA molecule.
Detailed explanation-4: -The purpose of Okazaki fragments is to allow DNA polymerase to synthesize the lagging strand in segments, since it is not oriented correctly for continuous synthesis.
Detailed explanation-5: -In DNA replication, Okazaki fragments are formed as double-stranded intermediates during synthesis of the lagging strand. They are composed of the growing DNA strand primed by RNA and the template strand.