Over the past 12 weeks, a 75-year-old man with a moderate aortic stenosis has developed shortness of breath and chest pains during exertion. He appears pale. Test of his stool for blood is positive. Laboratory studies show the following: hemoglobin 7.2 g/dL, and mean corpuscular volume 75. A blood smear shows microcytic, hypochromic erythrocytes. Which of the following is the most likely diagnosis?

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#Question id: 404

#SCPH28 | Zoology

When a mixture of 3-phosphoglycerate and 2-phosphoglycerate is incubated at 25 °C with phosphoglycerate mutase until equilibrium is reached, the final mixture contains six times as much 2-phosphoglycerate as 3-phosphoglycerate.  Which one of the following statements is most nearly correct, when applied to the reaction as written?  (R = 8.315 J/mol·K; T = 298 K)  3-Phosphoglycerate -> 2-phosphoglycerate

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#Question id: 4589

#SCPH06 I Botany

Darwin used the phrase "descent with modification" to explain ________.

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#Question id: 3686

#SCPH28 | Zoology

The short strand of ........ primer is required for the replication of DNA:

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#Question id: 7310

#I Life Science/ Life Sciences Group – I-V

Which statement best describes the mechanism for circadian rhythm?

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#Question id: 7758

#SCPH01 Biochemistry

Chlorophyll is tightly bound in complexes with proteins. During senescence these chlorophyll–protein complexes must be dismantled to allow the apoproteins to be recycled by___