cloud. âThe surface of the earth changes. Some changes are due to slow processes, such as erosion and weathering, and some changes are due to rapid processes, such as landslides, volcanic eruptions, earthquakesâ and collisions by large meteorites with the earth.
DNA gyrase, often referred to simply as gyrase, is an enzyme that relieves strain while double-strand DNA is being unwound by helicase. It is also known as DNA topoisomerase II.This causes negative supercoiling of the DNA.his process occurs in prokaryotes (in particular, in bacteria), whose single circular DNA is cut by DNA gyrase and the two ends are then twisted around each other to form supercoils. Gyrase has been found in the apicoplast of the malarial parasite Plasmodium falciparum, a unicellular eukaryote.
DNA helicase an enzyme that unwinds the DNA double helix during DNA replication 7. DNA polymerase an enzyme that catalyzes the formation of the DNA molecule 8. double helix Spiral-staircase structure characteristic of the DNA molecule 9. guanine Nitrogen base found in DNA and RNA: pairs with cystosine.10.ydrogen bonds how bases in DNA are held together 11. nitrogen base a functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms 12. nucleotide monomer of nucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base 13.