"Bubbles" along a strand of DNA indicate that 

A. DNA replication is occurring.
B. RNA synthesis is taking place.
C. transcription is occurring.
D. All of these are possible.


D. All of these are possible.

Biology & Microbiology

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The rickettsias can be cultured in

A) pure culture. B) artificial media. C) laboratory animals. D) pure culture, artificial media, and laboratory animals.

Biology & Microbiology

Muscles originate from

a. ectoderm. b. endoderm. c. mesoderm. d. ectoderm and endoderm. e. ectoderm and mesoderm.

Biology & Microbiology

A taproot system lacks

a. lateral roots. b. a taproot. c. both of the above. d. none of the above.

Biology & Microbiology

When a molecule absorbs a photon, one of its electrons is raised to the ________ state

A) energetic B) quantum C) positive D) excited

Biology & Microbiology