In Drosophila cells, the expression of the Sxl gene to form active protein product ...

In Drosophila cells, the expression of the Sxl gene to form active protein product requires:

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RNA processing that chemically alters the mRNA sequence is called:
 
  A. RNA editing.
  B. alternative splicing.
  C. RNA transformation.
  D. RNA modification.

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Histone variants:
 
  A. have been identified for H2B and H4 but not for H2A and H3.
  B. differ in their C-terminal sequences but not in their N-terminal sequences.
  C. that have been identified are associated with transcriptional activation only.
  D. have variant patterns of modifications as a result of the structural differences in their terminal sequences.
  E. have been found to affect all cellular processes that involve DNA except DNA repair.

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The general name for an enzyme that dephosphorylates proteins is:
 
  A. kinase.
  B. phosphorylase.
  C. phosphatase.
  D. dehydrogenase.

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Which of the following is not a feature of a bacterial artificial chromosome (BAC) vector?
 
  A. CEN sequences
  B. origin of replication (ori)
  C. par genes
  D. selectable antibiotic resistance gene
  E. cloning site within the -galactosidase gene