Which of the following are correct pairings of histone variants and their functions?

Which of the following are correct pairings of histone variants and their functions?

A. H3.3 stabilizes the open state (transcriptionally active)
B. CENPA maintains kinetochore attachment
C. H2AX DNA repair
D. macroH2A X chromosome inactivation
E. All of these choices are correct.

A bacterial artificial chromosome (BAC) is different from a plasmid vector because it:

A. lacks an origin for replication in bacteria.
B. accommodates much larger fragments (100300kb).
C. has a higher copy number than the plasmid vector.
D. has only selectable markers with which to detect its presence in cells.
E. lacks par genes that the plasmid has to maintain its high copy number.

The 3' cleavage and polyadenylation of mRNA is partly defined by the sequence:

A. AAUAAA.
B. AAAAAA.
C. CCCGGG.
D. GCGCGC.

Which of the following is least likely to be involved in a cell localization regulatory mechanism?

A. steroid hormone receptors
B. ubiquitination of proteins
C. dephosphorylation of proteins
D. sumoylation of proteins

TREX (transcription export) is responsible for:

A. splicing of mRNA.
B. transport of mRNA.
C. editing of mRNA.
D. degradation of mRNA.

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Which of the following are correct pairings of histone variants and their functions?

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