The size of the human genome is 3.2x109bp. The 3.2kb long fragment is to be amplified by Polymerase Chain Reaction (PCR) using the human genome as a template. How many cycles of PCR is necessary for the amplified target sequence at least 50% (by mass) of the total DNA in the reaction mixture. Explain how you arrived to this number.

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Anurse is assessing a client who is receiving oxytocin via continuous iv infusion for labor augmentation. the nurse notes six contractions in a 10 min period with a non-reassuring fhr. which of the following actions should the nurse take first? a. discontinue the oxytocin iv infusion. b. turn the client to her left side. c. administer terbutaline 0.25 mg subcutaneously. d. apply oxygen at 10 l/min via face mask.

Anurse is planning teaching for a client who has asthma about taking montelukast. which of the following should the nurse include about the purpose of this medication? a. relieves acute bronchospasm b. inhibits replication of neutrophils c. controls inflammation in the airways d. activates beta2-receptors in smooth muscle