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oliver mccoy 24 stone road stafford staffordshire England or its one of the 20s
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How many rings does a purine have?
there are double rings in the purine bases and there is only a single ring in the pyrimidine base.
What is the nitrogeneous base containing 2 carbon rings?
purines
How many nitrogenous bases are there What are they called?
Four, out of whish 2 purines and two pyremidines
Why are thymine and cytosine are called pyrimidines?
Adenine and guanine are called purines because they are composed of the 2-ringed heterocyclic aromatic organic compound purine.
What are two essential types of nucleotide sequences found in transposon DNA?
1. Purines 2. Pyrimidine
The two sides of the dna molecule are held together by what?
Hydrogen bonds between the purines and pyrimidines. A and T form 2 hydrogen bonds, and G and C form three.
What type of bonding exists between particular purines and pyrimidines in DNA?
adenine and thymine are bonded by 2 hydrogen bonds and cytosine and guanine are bonded by 3 hydrogen bonds
Why did Watson and Crick conclude that each base could not pair with itself?
The uniform width of 2 nm would not permit two purines or two pyrimidines to pair together.
What substance make up a DNA molecule?
The DNA is the longest biopolymer discovered. It is made up of two strands that are the polymers of repeating units of deoxyribonucleotides. The deoxyribonucleotides, themselves consist of three moieties: 1. Deoxyribose Sugar: A pentose (5 carbon) Sugar 2. Phosphate: Phosphate group imparts the negative charge to DNA molecule 3. Nitrogenous Bases: These are aromatic compounds that have their basic nature due the presence of Nitrogen. Two types of bases are found in the DNA molecule 1. Pyrimidine: they are single ringed compounds that are derivative of compound called Pyrimidine. There are two types of Pyrimidines in DNA, Cytosine and Thymine. 2. Purines: Purines are derivative of organic compounds called as Purines and have two rings. There are two Purines: Adenine and Guanine) in DNA. The dexoribonucleotides are linked by the reaction of Phosphodiester bond to form one strand of DNA>
Is thymine single ringed?
1, thymine and cytosine are pyrimidines (1 ring). Purines (adenine and guanine) have 2 rings.
What are the pairs of DNA?
In base-pairing rules by Watson and Crick, the nitrogenous bases Adenine(A) base pair with Thymine(T), and Guanine(G) base pair with Cytosine(C) in the DNA. They are called nitrogenouse bases as they contain nitrogen atoms. There are 2 types of bases- purines and pyrmidines. Purines like A and T have fused 5- and 6- member rings. Pyrimidines like G and C have one six member ring. Adenine - Thymine Cytosine - Guanine
Is durum wheat good for gout patient?
Avoid all foods that are high in purines:1. Meat is ranked the highest. Organ meats, such as liver, heart, kidney and brain, contain the most amount of purines. Bacon contains high levels of purine, and, therefore, should be strictly avoided. Poultry, such as, chicken and turkey can be consumed only in moderation.2. Seafood should be avoided as this too contains high purine levels. Shellfish such as crab, lobster, and shrimp, sardines, tuna, mackerel, herring, halibut and salmon are some seafood that contains high purine levels.3. Some vegetables with high purines are mushrooms, black gram, beans, peas, lentils, broccoli, cauliflower, carrots, aubergine and spinach.4. Any food item that contains yeast should be avoided as this too contains high purine levels. Various alcoholic beverages, especially beer and breads contain excessively high amounts of purines.5. Dried fruits such as dates and figs, and fresh fruits such as bananas, avocado, apples, kiwi fruit, gooseberry and pineapple are all high in purines.
