Once the strands of DNA are separated, the enzyme DNA polymerase ____ and links nucleotides together
a. reads the nucleotide sequence of the template strand
b. transforms the template strand to either 3’ or 5’
c. transforms adenine to thymine and guanine to cytosine
d. folds the bases back on themselves
e. unwraps the DNA from the nucleosomes
a
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The ability of DNA-binding proteins to initiate transcription can be hindered by the presence of ________ on the promoter regions of the DNA
Fill in the blank(s) with correct word
Explain why a scientist would need to increase the dilution rate in a chemostat from 0.20 hr-1 to 0.50 hr-1.
A. When the dilution rate is low, the availability of an essential nutrient is limited, creating an environment where the organism synthesizes nutrients rapidly to overcome the deficit in the media thus producing toxic waste products. Increasing the dilution rate provides a greater quantity of the nutrient effectively slowing growth and minimizing the level of waste. B. When the dilution rate is low, the total available energy provided by the media exceeds the maintenance energy required by the culture. Increasing the dilution rate flushes out some of the organisms to strike a balance between available energy and maintenance energy. C. When the dilution rate is low, the availability of an essential nutrient is limited, creating an environment where the organism can expend energy on survival only, not growth and reproduction. Increasing the dilution rate enables an increase in cell density. D. When the dilution rate is low, cell reproduction is high, creating a space limitation for the rapidly-dividing organisms. Increasing the dilution rate slows growth to free up available space.
Segregation
A. happens whenever a cell is fertilized. B. happens when chromosomes separate and move to the poles. C. is the separation between daughter cells after cell division. D. None of these answers define segregation.
The oomycete that nearly destroyed the French wine industry in the late 1870s was
A) a cercozoan. B) a slime mold. C) red tide. D) a water mold. E) a protozoan.