QUESTION NO. 1 Base excision repair A. is used only for bases that have been deaminated. B. uses enzymes called DNA glycosylases to generate an abasic sugar site. C. removes about 10 to 15 nucleotides. D. does not require an endonuclease. E. recognizes a bulky lesion. QUESTION NO. 2  Termination of a prokaryotic transcript A. is a random process. B. requires the presence of the rho subunit of the holoenzyme. C. does not require rho factor if the end of the gene contains a G-C rich palindrome. D. is most efficient if there is an A-T-rich segment at the end of the gene. E. requires an ATPase in addition to rho factor.   QUESTION NO. 3  Eukaryotic transcription A. is independent of the presence of upstream consensus sequences. B. may involve a promoter located within the region transcribed rather than upstream. C. requires a separate promoter region for each of the three ribosomal RNAs transcribed. D. requires that the entire gene be in the nucleosome form of chromatin. E. is affected by enhancer sequences only if they are adjacent co the promoter .

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
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QUESTION NO. 1
Base excision repair

A. is used only for bases that have been deaminated.
B. uses enzymes called DNA glycosylases to generate an abasic sugar site.
C. removes about 10 to 15 nucleotides.
D. does not require an endonuclease.
E. recognizes a bulky lesion.

QUESTION NO. 2 
Termination of a prokaryotic transcript

A. is a random process.
B. requires the presence of the rho subunit of the holoenzyme.
C. does not require rho factor if the end of the gene contains a G-C rich palindrome.
D. is most efficient if there is an A-T-rich segment at the end of the gene.
E. requires an ATPase in addition to rho factor.
 
QUESTION NO. 3 
Eukaryotic transcription

A. is independent of the presence of upstream consensus sequences.
B. may involve a promoter located within the region transcribed rather than upstream.
C. requires a separate promoter region for each of the three ribosomal RNAs transcribed.
D. requires that the entire gene be in the nucleosome form of chromatin.
E. is affected by enhancer sequences only if they are adjacent co the promoter .

QUESTION NO. 4 
Slipped, mispaired DNA occurs when the DNA region has
 
A. direct repeats.
B. homopurine-homopyrimidine sequences.
C. inverted repeats.
D. mirror repeats.
E. palindromes. 

QUESTION NO. 5 
Termination of a prokaryotic transcript

A. is a random process.
B. requires the presence of the rho subunit of the holoenzyme.
C. does not require rho factor if the end of the gene contains a G-C rich palindrome.
D. is most efficient if there is an A-T-rich segment at the end of the gene.
E. requires an ATPase in addition to rho factor.







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