Search results
DNA is made of four types of nucleotides, which are linked covalently into a polynucleotide chain (a DNA strand) with a sugar-phosphate backbone from which the bases (A, C, G, and T) extend. A DNA molecule is composed of two (more...)
25 lip 2022 · In double stranded DNA, the guanine (G) base on one strand can form three H-bonds with a cytosine (C) base on another strand (this is called a GC base pair). The thymine (T) base on one strand can form two H-bonds with an adenine (A) base on the other strand (this is called an AT base pair).
30 gru 2022 · The basis of the double-stranded nature of DNA, and in fact the basis of nucleic acids as the medium for storage and transfer of genetic information, is base-pairing. Base-pairing refers to the formation of hydrogen bonds between adenines and thymines, and between guanines and cytosines.
15 maj 2022 · The rules of base pairing tell us that if we can "read" the sequence of nucleotides on one strand of DNA, we can immediately deduce the complementary sequence on the other strand.
Figure 28.3 Hydrogen-bonding between base pairs in the DNA double helix. Electrostatic potential maps show that the faces of the bases are relatively neutral, while the edges have positive and negative regions. Pairing G with C and A with T brings together oppositely charged regions.
bases that mediate interactions between the two strands of the double helix. Bases are flat rings consisting of carbon and nitrogen atoms; they are said to be heterocyclic because they are composed of rings containing other atoms
There are chemical cross-links between the two strands in DNA, formed by pairs of bases held together by hydrogen bonds. They always pair up in a particular way, called complementary...
