5 3 3 5 T-A G-C C-G C-G T-A G-C 3' G-C T•A-T T•A-T T.A-T T•A-T T•A-T C+G-C T.A-T T•A-T T•A-T C+G-C T.A-T T•A-T C+G-C T•A-T T•A-T T•A-T T.A-T C+G-C T•A-T T•A-T 5' G-C G-C 3' C-G з 5 (b) Example sequence of bases (a) Ribbon model FIGURE 9.15 The structure oftriplex DNA. (a) As seen in the ribbon model, the third, synthetic strand binds within the major groove of the double-stranded structure. (b) Within triplex DNA, the third strand hydrogen bonds according to the rule T to AT, and C to GC. The cy tosine bases in the third strand are protonated (i.c., positively charged).
DNA and RNA
Deoxyribonucleic acid (DNA) is usually called the blueprint of life. Deoxyribose is a monosaccharide that has a key function in the synthesis of deoxyribonucleic acid. One less oxygen-containing hydroxyl group occurs in deoxyribose sugar. Nucleic acid, deoxyribonucleic acid, is one of the natural components. Deoxyribonucleic acid is a double-stranded molecule. Watson and Crick postulated the double-stranded model of the helix. A deoxyribonucleic acid is a molecular group that carries and transmits genetic information from parents to offspring. All eukaryotic and prokaryotic cells are involved.
DNA as the Genetic Material
DNA, or deoxyribonucleic acid, is a long polymeric nucleic acid molecule discovered in the late 1930s. It is a polymer; a long chain-like molecule made up of several monomers connected in a sequence. It possesses certain characteristics that qualify it as a genetic component. Certain organisms have different types of nucleic acids as their genetic material - DNA or RNA.
Genetics
The significant branch in science which involves the study of genes, gene variations, and the organism's heredity is known as genetics. It is also used to study the involvement of a gene or set of genes in the health of an individual and how it prevents several diseases in a human being. Thus, genetics also creates an understanding of various medical conditions.
DNA Replication
The mechanism by which deoxyribonucleic acid (DNA) is capable of producing an exact copy of its own is defined as DNA replication. The DNA molecules utilize a semiconservative method for replication.
On further analysis of the DNA described in conceptual question
C21, you discover that the triplex DNA in this alien organism is
composed of a double helix with a third strand wound within the
major groove (just like the DNA in Figure shown). How would you
propose that this DNA is able to replicate itself? In your answer,
be specific about the base-pairing rules within the double helix
and which part of the triplex DNA would be replicated first.
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