21. Draw the hydrogen bonds between A and T that hold the double helix together. Show both molecules and label the hydrogen bonds. You can use the model from above to see these interactions. The A-T and G-C base pairs are shown in detail towards the end of the model program. You can also google A-T base pairing to find an image to refer to while drawing.
Nucleotides
It is an organic molecule made up of three basic components- a nitrogenous base, phosphate,and pentose sugar. The nucleotides are important for metabolic reactions andthe formation of DNA (deoxyribonucleic acid) and RNA (ribonucleic acid).
Nucleic Acids
Nucleic acids are essential biomolecules present in prokaryotic and eukaryotic cells and viruses. They carry the genetic information for the synthesis of proteins and cellular replication. The nucleic acids are of two types: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The structure of all proteins and ultimately every biomolecule and cellular component is a product of information encoded in the sequence of nucleic acids. Parts of a DNA molecule containing the information needed to synthesize a protein or an RNA are genes. Nucleic acids can store and transmit genetic information from one generation to the next, fundamental to any life form.
In the double helix DNA structure, the two strands are DNA are held together with hydrogen bonds that are formed between complementary pairs of purines and pyrimidines. Adenine (A) pairs with Thymine (T) by two hydrogen bonds and Guanine (G) pairs with Cytosine (C) by three hydrogen bonds respectively.
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