The rate of aerobic respiration in plants depends upon the
a. availability of oxygen.
b. lifestyle stage.
c. temperature.
d. all of these
D
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The advent of recombinant DNA technology made the sequencing of genomes possible
a. True b. False Indicate whether the statement is true or false
The difference in mode of inheritance between Huntington disease and cystic fibrosis is that
A) Huntington disease skips generations and only affects children, whereas cystic fibrosis can strike at any age and never skips generations. B) Huntington disease does not skip generations but cystic fibrosis can. C) A person with Huntington disease can have unaffected parents, but a person with cystic fibrosis must have an affected parent. D) Huntington disease affects females and cystic fibrosis affects males.
Salmonella are
What will be an ideal response?
In the Ames test, mutagenicity is normally tested on a strain of bacterium (Salmonella typhimurium) that cannot synthesize the amino acid histidine. Therefore, these bacteria require histidine in the growth plate to survive. A researcher performs the Ames test to evaluate the mutagenicity of a newly synthesized compound and notices that Salmonella typhimurium is living on a histidine-free growth plate. What can be concluded from these results?
A. The bacteria produce histidine. B. The newly synthesized compound induces a mutation in the bacteria and the bacteria no longer produce histidine. C. The newly synthesized compound induces a mutation in the bacteria and the bacteria produce histidine. D. The bacteria no longer produce histidine. E. The newly synthesized compound induces a mutation in the bacteria.