The supercoiling of double-stranded circular DNA can be removed by cleaving a single phosphodiester bond on only one strand (nicking).
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Q79: Uracil is found in most RNA,while 5-methyluracil
Q80: Absorption of single-stranded DNA at 260 nm
Q81: About 150 bp of DNA wrap around
Q82: It is not possible for linear DNA
Q83: Single strands of DNA can be pulled
Q85: When stretched,strands of poly (dT)give no resistance
Q86: Alkaline hydrolysis with 0.1 M NaOH is
Q87: Topoisomerases cut one or both coiled DNA
Q88: Prokaryotic DNA is organized into protein-DNA structures
Q89: RNAs are single-stranded molecules with little complex
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