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Learn about the base pairing interactions and helix structures of DNA and RNA molecules. Find out how hybridization, melting, and loop motifs affect the secondary structure of nucleic acids.
Learn about the secondary structure of DNA and RNA, which is the set of interactions between bases that determine the shape of the molecule. DNA forms a double helix by base pairing of two polynucleotide strands, while RNA can form single-stranded and double-stranded regions with various elements such as loops, bulges, and pseudoknots.
3 Οκτ 2012 · G-quadruplex (G4) DNA is a stable secondary structure held together by G-G base pairs. DNA sequences capable of forming G4 DNA in vitro (G4 motifs) are enriched in ribosomal DNA and promoter...
Learn about the double helix model of DNA, the complementary base pairing of AT and GC, and the replication process of DNA. See illustrations, examples, and learning objectives of this topic.
12 Ιουν 2023 · This base pairing of nucleotides between the two strands of a single DNA molecule is called DNA’s secondary structure. The three-dimensional shape of a DNA molecule, or its tertiary structure, is a right-handed double helix (Figure 2b).
A DNA molecule consists of two long polynucleotide chains composed of four types of nucleotide subunits. Each of these chains is known as a DNA chain, or a DNA strand. Hydrogen bonds between the base portions of the nucleotides hold the two chains together (Figure 4-3).
17 Μαρ 2022 · Learn how DNA is a double helix of two complementary strands of nucleotides, each with a sugar, a phosphate, and a base. Find out how RNA differs from DNA in its sugar and uracil base.
