In a mammal 2 Barr bodies are observed.  How many X chromosomes does the organism have?

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#Question id: 2374

#XL - Q Biochemistry

Which of the following best describes the fluid mosaic model?

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#Question id: 347

#XL - S Microbiology

A beaker contains 100 milliliters (mL) of NaOH solution at pH = 13. A technician carefully pours into the beaker 10 mL of HCl at pH = 1. Which of the following statements correctly describes the result of this mixing?

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#Question id: 19615

#XL - P Chemistry

The reaction rate constant can be defined as the rate of reaction when each reactant’s concentration is ___________.

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#Question id: 4137

#XL - T Zoology

Formation of the ribosomal initiation complex for bacterial protein synthesis does not require:

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#Question id: 404

#XL - S Microbiology

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