Galactosemia is a case of __________ inheritance.
A) autosomal dominant
B) autosomal recessive
C) X-linked dominant
D) X-linked recessive
Answer: B) autosomal recessive
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Activation of the IFN-? globin promoter is an example of a histone code. Of the steps given, which is the third in this process?
A. The TATA box in the promoter is exposed. B. Complexes containing Gcn5 bind to the promoter and acetylate nearby nucleosomes. C. A chromatin remodeling complex such as SW1/SNF binds to and moves the nucleosome. D. Initiation of transcription occurs. E. A protein kinase binds to the Gcn5 complex and phosphorylates nearby nucleosomes.
Which technique can be used to identify a protein of interest after a two-dimensional gel electrophoresis experiment?
A. DNA microarray B. Treatment with reverse transcriptase to isolate the DNA of interest C. BLAST analysis D. Mass spectrometry
A cancer stem cell can divide to give rise to
A) tumor cells, abnormal daughter cells, normal cells, and more cancer stem cells. B) more cancer stem cells only. C) healthy stem cells and normally differentiated cells. D) invasive cells and metastatic malignant cells.
Which of the following series is arranged in the correct sequence for nitrogen fixation and its subsequent use?
A. atmospheric nitrogen; production of ammonia; use of bacterial nitrogenase; synthesis of proteins; conversion by plants or algae B. atmospheric nitrogen; use of bacterial nitrogenase; production of ammonia; conversion by plants or algae; synthesis of proteins C. atmospheric nitrogen; production of ammonia; use of bacterial nitrogenase; conversion by plants or algae; synthesis of proteins D. ammonia; conversion by plants and algae; production of atmospheric nitrogen; use of bacterial nitrogenase; synthesis of proteins E. atmospheric nitrogen; use of bacterial nitrogenase; conversion by plants or algae; production of ammonia; synthesis of proteins