Which of the following associations of term and description is NOT correct?
A. sarcolemma - extensive plasma membrane
B. actin - thin filament
C. sarcomere - the entire muscle cell or muscle fiber
D. myosin - thick filament
Answer: C
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Which of the following features of transcription initiation is least likely to contribute to the process of "abortive initiation"?
A. Early in initiation, the RNA exit channel of RNA polymerase is blocked by the polymerase itself. B. Early in initiation, the RNA exit channel of RNA polymerase is blocked by the sigma factor. C. The transition between the closed and open complex is energetically costly. D. RNA is synthesized de novo, requiring no primer. E. Early in initiation, the processivity of RNA polymerase is low.
Which of the following descriptions of genetic information flow best illustrates the central dogma of biology?
A) DNA to RNA to protein B) RNA to DNA to protein C) protein to DNA to protein D) protein to RNA to DNA
Radiolarian ooze is produced by multi-cellular organisms
Indicate whether the statement is true or false
The antimicrobial drugs with the broadest spectrum of activity are
A) aminoglycosides. B) chloramphenicol. C) penicillin G. D) macrolides. E) tetracyclines.