Which Factor Distinguishes Type I from Type II Topoisomerases

question 51

Multiple Choice

Which factor distinguishes Type I from Type II topoisomerases?

• A) covalent attachment of the nucleic acid to a tyrosine
• B) the presence of arginine and lysine residues in DNA binding sites
• C) the use of phosphoanhydride bonds to provide energy
• D) a mixture of covalent and noncovalent forces in binding of substrate
• E) cleavage of the sugar-phosphate backbone in the nucleic acid substrate

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