A patient’s urine is collected for 2 hr, and the total volume is 600 ml during this time. Her urine osmolarity is 150 mOsm/L, and her plasma osmolarity is 300 mOsm/L. What is her “free water clearance”?

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#Question id: 585

#Unit 1. Molecules and their Interaction Relevant to Biology

In an enzyme reaction involving one enzyme and one substrate, the rate of the reaction depends on

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#Question id: 4569

#Unit 11. Evolution and Behavior

Which of the following must exist in a population before natural selection can act upon that population?

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#Question id: 19482

#Unit 12. Applied Biology

It has been proposed that the DNA-protein complex forms 

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#Question id: 782

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following experimental requirements makes an siRNA approach unsuitable for determining the consequence of silencing a gene of interest in an established cell line?

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#Question id: 11454

#Unit 7. System Physiology – Animal

The structure of the mammalian middle ear is adapted to convert ________.