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... help determine the three - dimensional shape of large molecules . As you will ... lab report is back . " Dr. Kim quickly scanned the results . " Looks like ... Chemical Bonding Chemical Bonds Bond Boulevard 4 . Why is Dr. Kim concerned ...
... nucleotides. Each nucleotide of DNA consists of three parts (Figure 2.23a): 1. Nitrogenous base. DNA contains four different nitrogenous bases, which contain atoms of C, H, O, and N. In DNA the four nitrogenous bases are adenine (A) ...