Following damage, what is the correct order of events during excision repair?
a. synthesis, incision, excision, ligation
b. incision, excision, synthesis, ligation
c. incision, synthesis, ligation, excision
d. ligation, synthesis, excision, incision
e. excision, incision, synthesis, ligation
Ans: b
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a. Amastigote b. Epimastigote c. Trypomastigote d. Promastigote
All of the following may result from overgrowth of Clostridium difficile in the large intestine EXCEPT
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A cactus spine and a pea tendril illustrate homoplasy because both are modified leaves
__________________ Indicate whether the statement is true or false.
A new DNA strand elongates only in the to direction because _____
A) DNA polymerase begins adding nucleotides at the end of the template B) the polarity of the DNA molecule prevents addition of nucleotides at the end C) replication must progress toward the replication fork D) DNA polymerase can add nucleotides only to the free end