A 75-year-old man goes to the hospital emergency department and faints. Five minutes later he is alert. An EKG shows 75 P waves per minute and 35 QRS waves per minute with a normal QRS width. Which of the following is the likely diagnosis?

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#Question id: 1264

#Unit 4. Cell Communication and Cell Signaling

 Desmosomes

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#Question id: 12745

#Unit 13. Methods in Biology

Choose the correct statement about Serotyping.

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#Question id: 55

#Unit 1. Molecules and their Interaction Relevant to Biology

The standard free energy change for the reaction A → B is −15.0 kJ · mol−1. What is the equilibrium constant for the reaction at 25°C?

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#Question id: 10502

#Unit 6. System Physiology – Plant

Arabidopsis roots in iron-deficient growth media, thereby facilitating increased iron uptake. The resulting increase in iron content of the plants by

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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