sample3MT2

sample3MT2 - Bio 115, Spring 2005 Midterm #2, May 19 Name_...

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Bio 115, Spring 2005 Name__________________ Midterm #2, May 19 ________________________________________________________________________ page 1 page total: Instructions: Write your name in ink at the top of every page. Do not write on the back of pages. Restrict your answers to the space provided. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Answer the following questions with "true" or "false". For each "true" answer, give an example or explanation that supports the statement. For each "false" answer, explain why the statement is false. (3 points each) 1. Regulating Poly-A tail length is a mechanism for controlling mRNA lifetime. 2. Histone H1 is necessary for assembly of the 10 nm chromatin fiber. 3. ATP-dependent chromatin remodeling machines alter chromatin structure by modifying histone tails. 4. The stop codon UAG in a messenger RNA is recognized by a tRNA with a CUA anticodon. 5. DNase I hypersensitive sites are usually located in heterochromatin. 6. Only RNA polymerase II transcripts go through extensive RNA processing.
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Bio 115, Spring 2005 Name__________________ Midterm #2, May 19 ________________________________________________________________________ page 2 page total: 6. Binding of the origin recognition complex triggers DNA replication in yeast. 7. The sliding clamp increases the processivity of DNA helicase during replication. 8. An IRES can bypass the need for a cap in eukaryotic translation initiation. 9. EF-Tu (eEF1) does not chaperone all charged tRNAs to the ribosome during translation. 10. Chain terminating nucleotides cannot be incorporated into growing DNA chains because they lack phosphates. 11. The start codon of an open reading frame is not always found in the first exon of the pre-mRNA transcript. 12. The U snRNAs involved in splicing do not interact directly with the pre-mRNA.
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Bio 115, Spring 2005 Name__________________ Midterm #2, May 19 ________________________________________________________________________ page 3 page total:
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This document was uploaded on 08/12/2009.

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sample3MT2 - Bio 115, Spring 2005 Midterm #2, May 19 Name_...

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