With the E. coli trp operon where both repression and attenuation occur, the extent of regulation achieved by repression is ________ the extent of regulation achieved by attenuation.
A. greater than
B. less than
C. the same as
D. Repression is not used in the regulation of the E. coli trp operon.
Answer: A
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One reason organic farming is used is because in contrast to other farming methods certain inorganic fertilizers may be easily:
A. leached from soils B. bound by soil particles C. not useful as minerals at all D. lack the essential minerals needed for plant growth E. too high acid content
The flies with variegated eye color had what abnormal chromosome structure?
A) X-chromosome inversion that moves the w+ gene to a different orientation on the chromosome in some cells following X-ray exposure B) X-chromosome translocation that moves the w+ gene to a region of heterochromatin on another chromosome in some cells following X-ray exposure C) a mutation in the w+ gene following X-ray exposure that causes the gene to be overexpressed in a tissue-specific manner D) X-chromosome deletion that deleted the w+ gene in some cells following X-ray exposure E) a mutation in a somatic chromosome that causes the w+ gene to be translocated to the X-chromosomes following X-ray exposure
Mitochondria and chloroplasts of eukaryotic cells are very similar to prokaryotes
Indicate whether the statement is true or false
The chances of guessing the right answer to this question are
A. 1/1. B. 1/2. C. 1/3. D. 1/4.