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10: Amplifying and Manipulating DNA Fragments - Biology

10.1: Prelude to Molecular GeneticsToday, classical genetics is often complemented by molecular biology, to give molecular genetics, which involves the study of DNA and other macromolecules that have been isolated from an organism. Usually, molecular genetics experiments involve some combination of techniques to isolate and analyze the DNA or RNA transcribed from a particular gene.
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21.1: Structure of the Heart - Biology

The heart muscle is asymmetrical due to the distance blood must travel in the pulmonary and systemic circuits. Since the right side of the heart sends blood to the pulmonary circuit, it is smaller than the left side which must send blood out to the whole body in the systemic circuit, as shown in Figure 1.
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