What is the effect of surrounding a gene with insulators?
What will be an ideal response?
Ans: A gene that is surrounded by insulators is protected from the activating or inactivating effects of DNA surrounding it. Insulators will not generally activate or inactivate the gene, but will merely prevent further changes in expression due to local effects.
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Consider an antibacterial drug. In which of the following cases would the action of the drug be considered primarily bacteriostatic?
A. The MLC is 10-20 times higher than the MIC. B. The MLC is 2-4 times higher than the MIC. C. The MLC is lower than the MIC. D. The minimal lethal concentration (MLC) is equal to the minimal inhibitory concentration (MIC).
Fungi are heterotrophs that feed off decaying matter. What is the term for this type of feeder?
a. saprobes b. mycophytes c. caprophiles d. chemolithotrophs
Aerobic respiration became established as a result of the evolution of ____
a. the first protocells b. the first true cells c. metabolism d. the nuclear envelope e. the oxygen-producing pathway of photosynthesis
In a pedigree, a person whose symbol is filled in and who is associated with the roman numeral II
_____. A. is affected by the trait and in the second generation B. is not affected by the trait and in the second generation C. is affected by the trait and is the second-oldest child in the family D. is not affected by the trait and is the second-oldest child in the family E. is affected by the trait and has an identical twin