Question

23. The angle between the 1st and 5th base pairs in a DNA molecule is : 1) 360° 2) 216° 3) 180° 4) 144°

Answer 1

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There are three types of DNA Mutations: base substitutions, deletions and insertions. Single base substitutions are called point mutations, recall the point mutation Glu -----> Val which causes sickle-cell disease. Point mutations are the most common type of mutation and there are two types.