enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Split gene theory - Wikipedia

    en.wikipedia.org/wiki/Split_gene_theory

    The split gene theory is a theory of the origin of introns, long non-coding sequences in eukaryotic genes between the exons. [1] [2] [3] The theory holds that the randomness of primordial DNA sequences would only permit small (< 600bp) open reading frames (ORFs), and that important intron structures and regulatory sequences are derived from stop codons.

  3. Nucleic acid structure - Wikipedia

    en.wikipedia.org/wiki/Nucleic_acid_structure

    DNA structure and bases A-B-Z-DNA Side View. Tertiary structure refers to the locations of the atoms in three-dimensional space, taking into consideration geometrical and steric constraints. It is a higher order than the secondary structure, in which large-scale folding in a linear polymer occurs and the entire chain is folded into a specific 3 ...

  4. Molecular Structure of Nucleic Acids: A Structure for ...

    en.wikipedia.org/wiki/Molecular_Structure_of...

    From the DNA double helix model, it was clear that there must be some correspondence between the linear sequences of nucleotides in DNA molecules to the linear sequences of amino acids in proteins. The details of how sequences of DNA instruct cells to make specific proteins was worked out by molecular biologists during the period from 1953 to 1965.

  5. Nucleic acid sequence - Wikipedia

    en.wikipedia.org/wiki/Nucleic_acid_sequence

    DNA sequencing is the process of determining the nucleotide sequence of a given DNA fragment. The sequence of the DNA of a living thing encodes the necessary information for that living thing to survive and reproduce. Therefore, determining the sequence is useful in fundamental research into why and how organisms live, as well as in applied ...

  6. Infinite sites model - Wikipedia

    en.wikipedia.org/wiki/Infinite_sites_model

    Like other mutation models, the ISM provides a basis for understanding how mutation develops new alleles in DNA sequences. Using allele frequencies, it allows for the calculation of heterozygosity , or genetic diversity , in a finite population and for the estimation of genetic distances between populations of interest.

  7. Central dogma of molecular biology - Wikipedia

    en.wikipedia.org/wiki/Central_dogma_of_molecular...

    The transfers of information from one molecule to another are faithful, deterministic transfers, wherein one biopolymer's sequence is used as a template for the construction of another biopolymer with a sequence that is entirely dependent on the original biopolymer's sequence. When DNA is transcribed to RNA, its complement is paired to it.

  8. Tetranucleotide hypothesis - Wikipedia

    en.wikipedia.org/wiki/Tetranucleotide_hypothesis

    The equalities G = C and A = T suggested that these bases were paired, this pairing being the basis of the DNA structure that is now known to be correct. Conversely the inequalities G ≠ A etc. meant that DNA could not have a systematic repetition of a fundamental unit, as required by the tetranucleotide hypothesis.

  9. Okazaki fragments - Wikipedia

    en.wikipedia.org/wiki/Okazaki_fragments

    Asymmetry in the synthesis of leading and lagging strands. Okazaki fragments are short sequences of DNA nucleotides (approximately 150 to 200 base pairs long in eukaryotes) which are synthesized discontinuously and later linked together by the enzyme DNA ligase to create the lagging strand during DNA replication. [1]