An isolate of a mutant bacterium appears to grow more slowly than the wild-type population from which it was isolated
Further studies showed that the slower growth was due to a markedly reduced DNA polymerase I activity. From this information, one would expect that this organism would also be deficient in the activity of DNA
A) excision repair.
B) recombination.
C) transcription.
D) translation.
E) unwinding.
Answer: A
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________ use inorganic electron donors released from deep-sea hydrothermal vents
A) Chemolithotrophs B) Photoheterotrophs C) Chemoheterotrophs D) Photolithotrophs
Which of the following best describes the number of distinct evolutionary branches in the domain
Archaea, as revealed by genome sequencing studies?
a. 3?4 b. 6?7 c. 9?10 d. at least 12 e. at least 20
Which sentence best describes the general reproductive strategy of flowering plants?
a. They reproduce only sexually. b. They mainly reproduce sexually, although many will reproduce asexually under certain circumstances. c. They reproduce only asexually. d. They mainly reproduce asexually, although many will reproduce sexually under certain circumstances.
After cell division, each daughter cell has
A) a lower surface area/volume ratio than the parent cell. B) a higher surface area/volume ratio than the parent cell. C) more DNA in its nucleus than the parent cell. D) less DNA in its nucleus than the parent cell.