What is the relationship between operons and transcription units?
a. They are two terms for the same thing.
b. An operon is made up of a transcription unit and associated regulatory DNA sequences.
c. A transcription unit is made up of an operon and associated regulatory DNA sequences.
d. An operon is comprised of multiple transcription units.
e. A transcription unit is comprised of multiple operons.
B
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The figure below shows three mouse populations and their associated changes in the frequency of B, the allele for dark fur. The recessive b allele codes for white fur. After 20 generations, in which population would you be most likely to encounter a white mouse?
A. N1
B. N2
C. N3
D. There is an equal probability of encountering a white mouse in all three populations.
E. There is an equal probability of encountering a white mouse in populations N1 and N3 and this is higher than in N2.
Symptoms of heat stroke include which of the
following? a. nausea and vomiting b. blurred vision c. dizziness d. muscle cramping e. all of these
The clear area devoid of bacterial growth around an antiseptic or disinfecant disk is referred to as the
no growth zone death zone zone of death zone of inhibition
Adjuvants appear to work by
A) stimulating cytokine release. B) encouraging the uptake and processing of antigens by dendritic cells. C) stimulating isotype-switching in B cells and cytokine release. D) stimulating cytokine release and encouraging the uptake and processing of antigens by dendritic cells. E) stimulating isotype-switching in B cells.