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What are pentoses? What are the roles of pentoses in DNA and RNA molecules?
Pentoses are carbohydrates made of five carbons.
The DNA molecule is made of a sequence of molecules is known as nucleotides. Each nucleotide is formed by the association of one pentose called deoxyribose with a phosphoric acid and a nitrogen-containing base (A, T, C or G). RNA is also produced by a sequence of nucleotides. The RNA nucleotides are made by association of one ribose (a pentose) with one phosphoric acid and one nitrogen-containing base (A, U, C or G).
Shapes of viruses Viruses occur in a wide variety of shapes. Some are spherical or polyhedral . Some are helical appearing cylindrical or rod-like and other are complex. Virus
EXCRETION IN HUMAN -
what is the first to develop in excretory system?
SUPERNUMERARY OR ACCESSORY CHROMOSOMES Wilson (1905) discovered them in Matapodium insect. Very small Chromosomes present in nucleus in addition to normal number of Chr
Directive and Non-directive Counseling Directive Counseling tends to be appropriate when the counselor is aware of the problem and/or is concerned about the behavio
History of diet nnd or tube feeding tolerance History of diet nnd or tube feeding tolerance: The dietitian presents the patient's history, which may include presence or hi
Define the meaning of value - Soil Value refers to relative lightness or darkness of a colour and is a measure of the amount of light that reaches the eye under standard lighti
Q. Can you explain Protease inhibitors? Ans. Protease inhibitors are the compounds which are found to some extent in cereal grains such as oats, wheat, barley and mai
Fusion of Sperm and the Egg After the penetration of the extracellular layers by sperm there occurs the fusion of the - sperm plasma membrane with that of the egg. In mammals
Shifting cultivation - Degradation of Ecosystem This method of cultivation is practised all over the globe, but is more prevalent in the tropical countries. In this practice a
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