A bacterial cell has a nonsense mutation that prevents it from producing a functional sigma subunit for RNA polymerase. Inability to synthesize a functional sigma subunit would have the most direct effect on
A. translation initiation.
B. transcription elongation.
C. transcription initiation.
D. transcription termination.
E. translation termination.
Answer: C
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When certain bodies of water develop regions known as "dead zones" it often means that:
A. Oxygen has been depleted. B. Carbon dioxide is not available. C. Nitrogen has become limited. D. Phosphorus has killed animals. E. Plant life no longer can survive.
There are individuals who are missing one of their sex chromosomes and are designated as XO individuals. These individuals
A. develop as males. B. develop as females. C. are unusually tall. D. are easily recognizable.
Following intense exercise, the human body attempts to overcome oxygen debt by
A) sweating.
B) elevating heart rate.
C) producing ATP.
D) taking deep breaths.
E) inhibiting contractions of smooth muscle.
Which of the following are physical stimuli that influence plant responses?
A. touch; gravity; herbivores; pathogens B. rocks; light; touch; music C. water; gravity; temperature; soil minerals; microorganisms D. wind; temperature; fungi E. CO2; light; water vapor; gravity