nitrogenous bases, their main differences, phosphate group & sugar
Nitrogenous bases
is made from alternating phosphate and sugar groups
Purines ➔ Adenine and Guanine ➔ Contain a 6-membered nitrogen containing ring fused to an imidazole ring Pyrimidines ➔ Thymine, Cytosine and Uracil ➔ Contain only a 6-membered nitrogen containing ring
main difference of purines and pyrimidines
phosphate groups phosphodiester bonds
sugar in DNA are joined together by _____ that form _____ between the third and fifth carbon atoms of adjacent sugar rings
Phosphate and sugar groups
what makes up DNA?
2-deoxyribose (which is a pentose (five-carbon) sugar)
The sugar in DNA is _____
Pyrimidines
Are aromatic heterocyclic organic compounds similar to pyridine
Pyrimidines
Have diverse biological functions such as antimicrobial, CNS depressant, anti-inflammatory, analgesic, anti-convulsant, anti-cancer, anti-helminthic, antioxidant and herbicidal activities
Uracil
In RNA, the Thymine is replaced by _____
glycosidic bond
The prime symbol being used to distinguish these carbon atoms from those of the base to which the deoxyribose forms a _____
Phosphate groups
These are known as the 3'-end (three prime end), and 5'-end (five prime end) carbons
Purines and Pyrimidines
_____ are found in meat and meat products, especially internal organs such as liver and kidney. They are also found in poultry, fish and seafood, asparagus, cauliflower, spinach, mushrooms, green peas, lentils, dried peas, beans, oatmeal, wheat bran, wheat germ, and haws
Pyridines
any class of organic compounds of the aromatic heterocyclic series characterized by a 6-membered ring structure
Purines
are heterocyclic aromatic organic compounds that consists of two rings in their structure
Yes
are purines water-soluble?
Purines
are the most widely occurring nitrogen-containing heterocyclics in nature
phosphate and sugar groups
at the backbone of the DNA strand is made from alternating _____
nitrogenous bases
at the molecular level, genes are regions of DNA which are made of different sequence of _____
Cytosine - Thymine
complementary base pairing (phosphate)
Adenine - Guanine
complementary base pairing (purine)
Nitrogenous bases
forms the backbone of the DNA strand