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strand
(redirected from Lagging strand)

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.01 sec.
strand [strand]
a thread or fiber or a structure resembling one.
antisense strand the strand of a double-stranded nucleic acid that is complementary to the sense strand; in DNA it is the template strand on which the mRNA is synthesized.
sense strand the strand of a double-stranded nucleic acid that encodes the product; in DNA it is the strand that encodes the RNA, having thus the same base sequence except changing T for U in the RNA. See also antisense strand.

strand
a term commonly used to describe one of the two complementary polynucleotide chains found in double-stranded DNA.

lagging strand
in DNA replication, the strand in which the nascent strand is synthesized in discontinuous segments after the other or leading strand. See also okazaki fragments.
leading strand
in DNA replication, the strand that is copied continuously.


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Because of the way DNA replicates, the enzyme that copies the lagging strand is unable to copy the DNA all the way to the end of the chromosome.
 
 
 
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