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Is the hydrogen bonding interaction between molecules that have the hydrogen atom (H) with molecules that have fluorine atoms (F) Oxygen (O) or nitrogen (N), which are highly electronegative elements, yielding dipoles very sharp. ACTIVITY These connections, where the pareia always with and with occur because the two purine bases can not fit as well as the two pyrimidine neither, there is still a mismatch of the existence of hydrogen bonding between the bases, where adenine and thymine have three bridges, and cytosine and guanine, two. This leads us to realize that knowing one of the chains, therefore, to know each other. Have you noticed that DNA is the essence of life. How do you justify the fact that by knowing the amount of one of the nitrogenous bases, therefore we know the amount of the other? Exemplifies. Think of a huge spiral rope ladder. Well, the DNA molecule resembles her, where handrails (strings) would be formed by molecules alternating phosphate and deoxyribose and the steps would be the nitrogenous bases linked by hydrogen bonds. Representation of the DNA molecule in different proportions. Now yes, we have a DNA molecule ... However, the story continues ... But before we continue, know some facts: Now that you've found that "gene is a portion of chromosomal DNA able to determine protein synthesis," how about doing an experiment and see such DNA? Place a strawberry in a plastic bag and knead it. Add 20 ml of detergent and a colorless teaspoon (tsp) of sodium chloride (table salt), strain with a piece of gauze. Strained the mixture, add 40 ml of alcohol and stir. Leave for a few minutes. The whitish structures that go up and get over the mixture are DNA strands.
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Je interakcija vodikove veze između molekula koje imaju atom vodika (H) s molekulama koje imaju atome fluora (F) Kisik (O) ili dušik (N), a koji su vrlo elektronegativni elementi, donosi dipolima vrlo oštar. AKTIVNOST Ovi spojevi, gdje pareia uvijek s sa javljaju zato što su dvije purinskih baza ne može stati, kao i dva pirimidinskih ne, još uvijek postoji neslaganje o postojanju vodikovim vezama između baza, gdje adenin i timin ima tri mosta, i citozin i guanin, dvije. To nas dovodi do zaključka da poznavanje jednog od lanaca, dakle, da se međusobno upoznaju. Jeste li primijetili da je DNK suština života. Kako opravdati činjenicu da poznavajući količinu jednog od dušičnih baza, dakle, znamo količinu drugima? Ilustrira. Zamislite veliki spiralni konop ljestvici. Pa, molekula DNK joj sliči, gdje rukohvati (žice) će biti formirana molekula naizmjeničnim fosfata i deoxyribose a koraci će biti dušičnih baza povezani vodikovim obveznica. Zastupljenost molekule DNA u različitim omjerima. Sada da, imamo DNA molekulu ... Međutim, priča se nastavlja ... No, prije nego što nastavimo, znati neke činjenice: Sada kada ste otkrili da "gen je dio kromosoma DNK u stanju odrediti sintezu proteina, kako se radi o" eksperiment i vidjeti takvu DNK? Stavite jagodu u plastičnu vrećicu i mijesiti. Dodati 20 ml deterdženta i bezbojan žličicu (žličica) natrijevog klorida (kuhinjska sol), soj s komadom gaze. Napeti smjesu, dodati 40 ml alkohola i promiješati. Ostavite nekoliko minuta. U bjelkasti strukture koje idu gore i dobiti preko smjese su DNK nizovima.