Discovery of the bacterial cytoskeletal protein FtsZ provided an important link in the evolution of cells since ________.

A. it is only present in E. coli
B. it is unrelated to any eukaryotic proteins
C. it has no known function
D. is was also discovered in mitochondria and chloroplasts


Answer: D

Biology & Microbiology

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In a normal fruit fly (Drosophila), the second thoracic segment has wings and the third thoracic segment has halteres (small knobbed structures that act as a balance and guidance system). A mutant fruit fly is identified in which the third thoracic segment produces wings instead of halteres. This abnormal fly has a mutation in which of the following?

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Although E. coli DNA polymerase I is not a replicase, it participates in DNA replication. What is its function?

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