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Q. How execute the two complementary nucleotide chains of the DNA facilitate the replication process of the molecule?
The fact that DNA molecule is made of two polynucleotide chains whose nitrogen-containing bases form hydrogen bonds facilitates the duplication of the molecule. During the DNA replication, the binding of the two chains is broken and each of them serves as a template for the formation of a new nucleotide sequence along it, with the help of the enzyme the DNA polymerase and obeying the pairing rule C-G, A-T. At the end of the process two double helix of DNA are produced, all made of an original template chain and of a new synthesized polynucleotide chain.
Photoreceptor - Phototropism The molecular nature of the photoreceptor is unsolved. Initially in the 1930s, some form of carotenoid was thought to be the phototropic receptor.
Cell movements are movements performed by cell structures, like the movements of cilia and flagella, the pseudopod movements (in amoeba, macrophages, etc.), the cyclosis of the cyt
Hydrogen ( H) has 1 electron, carbond ( c) has 6 electrons ; oxygen ( O) has electrons, Nitrogen ( n) HAS 7 electrons. Use the octet rule to determine which of the following is mos
Q. What do ADP and ATP mean? What are the functions of these molecules for the cellular energetic metabolism? ADP is an short form of adenosine diphosphate, two molecules of ph
St. Jude Medical Valve (SJM) : This is a low profile bi-leaflet valve, which was introduced in 1977. The leaflets and the housing are made of pyrolitic carbon. The currently
An amino acid is amphiprotic (have both acid and base) o Some are polar, non polar, acidic or basic List of amino acids (red are non-polar, yellow are
about kinematics
Inter specific Incompatibility This type of incompatibility is characterized by the prevention of fusion of gametes between members of different species. The incompatibility
Photosynthesis Two main energy pathways are recognised in living systems. These are photosynthesis and cellular respiration. Both have their respective but different electron
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