Recombination is catalyzed by enzymes called recombinases. One of the following
ID: 79081 • Letter: R
Question
Recombination is catalyzed by enzymes called recombinases. One of the following is an intermediate in recombination. Choose one and most importantly explain your answer..
a cross-like structure involving four nucleotide chains known as a Holliday junction.
four parallel strands of unwound DNA with DNA sequences identifying them as a recombination site.
two sets of intertwined double helical DNA.
a triplex DNA structure referred to as a displacement loop.
two segments of DNA with double strand breaks.
Recombination is catalyzed by enzymes called recombinases. One of the following is an intermediate in recombination. Choose one and most importantly explain your answer..
a cross-like structure involving four nucleotide chains known as a Holliday junction.
four parallel strands of unwound DNA with DNA sequences identifying them as a recombination site.
two sets of intertwined double helical DNA.
a triplex DNA structure referred to as a displacement loop.
two segments of DNA with double strand breaks.
Explanation / Answer
Answer: (a) cross-like structure involving four nucleotide chains known as a Holliday junction.
Holliday junction, cross-shaped structure that forms during the process of genetic recombination, when two double-stranded DNA molecules become separated into four strands in order to exchange segments of genetic information.
Holliday junctions have been considered a central intermediate in homologous recombination ever since Robin Holliday proposed their existence and suggested that crossovers result from their resolution.
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