The following is the PCR reaction that is programmed in the thermocycler to amplify the cheek cell DNA: 1.  95°C for 2 minutes 2.  95°C for 30 seconds 3.  58.1°C for 30 seconds      4.  72°C for 45 seconds 5.  Repeat steps 2-4 thirty (30) times 6.  72°C for 3 minutes 7.  Hold at 16°C indefinitely Which steps represent the denaturation, annealing and extension steps? a. Step 2 = Denature; Step 4 = Anneal; Step 6 = Extend b. Step 4 = Denature; Step 6 = Anneal; Step 7 = Extend c. Step 3 = Denature; Step 4 = Anneal; Step 6 = Extend d. Step 2 = Denature; Step 3 = Anneal; Step 4 = Extend

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Homeostasis

Homeostasis is a self-regulatory process through which different biological systems maintain constant internal environmental conditions to compensate for environmental changes. In human physiology, it is a process of self-regulating internal, chemical, and physical conditions at an optimal level for survival. The stability through homeostasis can be attained through dynamic equilibrium, in which there is a continuous change until it reaches its systemic conditions.