nucleotides and nucleic acids ppt to pdf

Nucleotides And Nucleic Acids Ppt To Pdf

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Nucleic acid metabolism

Copy embed code:. Automatically changes to Flash or non-Flash embed. WordPress Embed Customize Embed. URL: Copy. Presentation Description No description available. Fluorouracil Pathway: Fluorouracil Pathway Suicide inhibition because Flurouracil does not directly inhibit enzyme. Methotrexate: Methotrexate Competitive inhibitor of Dihydrofolate Reductase Used in, Acute lymphoblastic leukemia Osteosarcoma in children Solid tumor treatment Breast, head, neck, ovary, and bladder Prevents regeneration of tetrahydrofolate and removes activity of the active forms of folate Leucovorin Rescue Strategy in Methotrexate Chemotherapy: Leucovorin Rescue Strategy in Methotrexate Chemotherapy Patients given sufficient methotrexate that if were not followed by Leucovorin N 5 -methenyl-THF would be fatal.

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The presentation is successfully added In Your Favorites. Views: Category: Entertainment. Like it 0. Dislike it 0. Added: February 03, Posting comment Premium member. Presentation Transcript. Methotrexate: Methotrexate Competitive inhibitor of Dihydrofolate Reductase Used in, Acute lymphoblastic leukemia Osteosarcoma in children Solid tumor treatment Breast, head, neck, ovary, and bladder Prevents regeneration of tetrahydrofolate and removes activity of the active forms of folate.

Action of Allopurinol: Action of Allopurinol Allopurinol is purine base analog Three mechanisms Allopurinol is oxidized to alloxanthine by xanthine dehydrogenase Then Allopurinol and alloxanthine are inhibitors of xanthine dehydrogenase This inhibition decreases urate formation Then concentrations of Allopurinol and alloxanthine increase but do not precipitate as urate does.

Allopurinol and alloxanthine are excreted into the urine. You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation. Careers Webinars. All rights reserved. Use HTTPs.

Nucleotides and Nucleic Acids - Lehninger Chapter8 - PowerPoint PPT Presentation

Nucleic acids are the polymers of nucleotides. Nucleotide synthesis is an anabolic mechanism generally involving the chemical reaction of phosphate , pentose sugar , and a nitrogenous base. Destruction of nucleic acid is a catabolic reaction. Additionally, parts of the nucleotides or nucleobases can be salvaged to recreate new nucleotides. Both synthesis and degradation reactions require enzymes to facilitate the event. Defects or deficiencies in these enzymes can lead to a variety of diseases. Nucleotides can be separated into purines and pyrimidines.

The five bases that are found in nucleotides are often represented by their initial letter: adenine, A; guanine, G; cytosine, C; thymine, T; and uracil, U. You are not required to memorize the structures of these bases, but you must know how each one bonds to the sugar unit in a nucleotide. The Learning Objective of this Module is to identify the different molecules that combine to form nucleotides. The repeating, or monomer, units that are linked together to form nucleic acids are known as nucleotides. Nucleotides can be further broken down to phosphoric acid H 3 PO 4 , a pentose sugar a sugar with five carbon atoms , and a nitrogenous base a base containing nitrogen atoms.

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The nucleic acid backbone then is asequence of sugar-phosphate groups, whichdiffer only in the sequence of bases. Crick published a paperthat showed that notonly is the DNAmolecule double-stranded, but the twostrands wrap around. Transmission of hereditary information takesplace in the nucleus. Chromosomes - structure inside the nucleus. Each gene is a section of DNA molecule thatcontains specific sequence of 4 bases namely,A, G, C, and T containing nucleotides.

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Nucleic Acids and Protein Synthesis ppt.pdf

Clipping is a handy way to collect important slides you want to go back to later. Nucleotides that compose DNA are called deoxyribonucleotides. Learn new and interesting things. Get ideas for … A level biology new specification for E ach nucleot i de cont ai ns a phosphate group, a sugar group and a ni t rogen base. Functions and 1. D-DNA; Rare variant with 8 base pairs per helical turn, form in structure devoid of guanine.

If your institution subscribes to this resource, and you don't have a MyAccess Profile, please contact your library's reference desk for information on how to gain access to this resource from off-campus. Please consult the latest official manual style if you have any questions regarding the format accuracy. Nucleosides and nucleotides are the fourth and final major group of biochemical molecules and are essential for numerous biological functions in humans, including maintaining and transferring genetic information, playing a major role in energy storage, and acting as signaling molecules. These molecules can be divided into two major families—purines, which include adenosine and guanine, and pyrimidines, which include cytosine, thymidine, and uracil. The unique structures and interactions of these molecules serve as the building blocks of RNA and DNA molecules and allow fundamental processes of gene replication and protein synthesis to occur. Many other functions of the various nucleosides and nucleotides will be explored in later chapters.

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28.2: Nucleotides and Nucleic Acids

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Copy embed code:. Automatically changes to Flash or non-Flash embed. WordPress Embed Customize Embed. URL: Copy. Presentation Description No description available. Fluorouracil Pathway: Fluorouracil Pathway Suicide inhibition because Flurouracil does not directly inhibit enzyme.

Дэвид Беккер и два оперативных агента тоже пробовали сделать это, сидя в мини-автобусе в Севилье. ГЛАВНАЯ РАЗНИЦА МЕЖДУ ЭЛЕМЕНТАМИ, ОТВЕТСТВЕННЫМИ ЗА ХИРОСИМУ И НАГАСАКИ Соши размышляла вслух: - Элементы, ответственные за Хиросиму и Нагасаки… Пёрл-Харбор. Отказ Хирохито… - Нам нужно число, - повторял Джабба, - а не политические теории. Мы говорим о математике, а не об истории. Соши замолчала. - Полезный груз? - предложил Бринкерхофф.  - Количество жертв.

 - Если только… Сьюзан хотела что-то сказать, но поняла, что сейчас-то Стратмор и взорвет бомбу. Если только -. - Если только компьютер понимает, взломал он шифр или. Сьюзан чуть не свалилась со стула. - Что. - Может случиться так, что компьютер, найдя нужный ключ, продолжает поиски, как бы не понимая, что нашел то, что искал.

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Ролики хорошо крутились, и стол набирал скорость. Уже на середине комнаты она основательно разогналась. За полтора метра до стеклянной двери Сьюзан отпрянула в сторону и зажмурилась.

Сьюзан не отрываясь смотрела на эту малоприятную картину. Танкадо задыхался, явно стараясь что-то сказать добрым людям, склонившимся над. Затем, в отчаянии, он поднял над собой левую руку, чуть не задев по лицу пожилого человека. Камера выхватила исковерканные пальцы Танкадо, на одном из которых, освещенное ярким испанским солнцем, блеснуло золотое кольцо.

Стратмор провел рукой по вспотевшему лбу. - Этот шифр есть продукт нового типа шифровального алгоритма, с таким нам еще не приходилось сталкиваться. Эти слова повергли Сьюзан в еще большее смятение. Шифровальный алгоритм - это просто набор математических формул для преобразования текста в шифр.

Беккер кивнул.

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Merci G.

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