Which of the following damaged templates encountered by a replication fork is repaired by gap repair?
A. A replication fork encounters a lesion and translesion synthesis occurs.
B. The replication fork encounters a lesion and stalls.
C. The replication fork encounters a lesion and bypasses it, restarting synthesis on the other side of the lesion.
D. The replication fork encounters a lesion at which repair has been initiated and the fork collapses.
E. The replication fork encounters heteroduplex DNA.
C
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CAM plants keep stomata closed in the daytime, thus reducing loss of water. They can do this because they _____
A) fix CO2 into organic acids during the night B) fix CO2 into sugars in the bundle-sheath cells C) fix CO2 into pyruvate in the mesophyll cells D) use the enzyme phosphofructokinase, which outcompetes rubisco for CO2 E) use photosystem I and photosystem II at night
Kleckner and coworkers discovered a protein bound to the 5' termini of double-stranded breaks
In their effort to purify and identify this protein, what did they do to amplify the signal (enrich the number of covalently bound complexes), and which protein did they ultimately purify? What will be an ideal response?
A bacterial colony can be described as:
a. sufficiently large numbers of a bacterium that can be observable with the unaided eye. b. derived from many different types of bac-terial cells. c. belonging to different genera and species. d. having different genetic and phenotypic characteristics.
The rationale behind the construction of phylogenetic trees is based on ________.
A. comparisons made between organisms based on their protein composition identified by MALDI-ToF mass spectrometry B. comparisons between microorganisms that occupy different ecological niches C. differences in morphological and physiological characteristics between organisms D. the evolutionary relationship between organisms determined by aligning nucleotide sequences and identifying divergence events