describe a DNA molecule as two strands coiled to form a double helix, the strands being linked by a series of paired bases: adenine (A) with thymine (T) and cytosine (C) with guanine (G)
-first chromosome- likely to contain thousands of genes.
-gene loci -> double helix and appear to be parallel.
-double helix -> known as 'sugar phosphate backbone'
-in the centre there is a group of molecules called bases
-there are 4 different type of base called adenine, thymine, cytosine and guanine.
-in the molecule the bases are holding together the 2 helices.
-they are held together by pairing of the 2 (A-T) and (G-C) this is as known as base pairs. (always found in DNA)
-base pairs are gluing together one side of the DNA double helix with the other.
-order of the base on the right side of DNA is A, C, T, G, A, A, C, C, A, G. this is the order of the bases. this order is called the GENE.
-gene is inside a nucleus- order of bases (ATGC)
-number of bases- construction of protein in the cytoplasm- gives the characteristic.
question- why are the base pairs arranged A-T and G-C?
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