Q 56. Assertion: The coiling tension created by the helicase is removed by the topoisomerase enzyme which is also called DNA gyrase in prokaryotes. Reason: DNA polymerase III adds nucleotides only in one direction, which is 3' - 5'.
Answers
Answer:
Assertion is correct but the reason not support the correct meaning of the assertion.
Explanation:
Utilizing ATP, helicases move along double-stranded DNA and break hydrogen bonds to separate the strands. Topoisomerases work to relieve the topological stress that DNA denaturation by helicases causes in the helical DNA helix. These enzymes separate one chromosome's two DNA strands, allowing the other chromosome to slip through and release the tension.
By creating a new chemical link, the ligase enzyme connects two big molecules; for instance, DNA ligase binds two DNA segments together using the phosphodiester bond between two nucleotides.
In order to create polymers, polymerase enzymes combine monomer units using a specified pattern of bonding. For instance, the DNA polymerase enzyme creates new DNA by attaching deoxyribonucleotides to a primer in the 5' to 3' orientation via phosphodiester bonds.