Cells regulate gene expression by
A. producing termination factors.
B. turning on DNAase genes.
C. adding histones to the DNA.
D. limiting the length of time that mRNA is available for translation.
D. limiting the length of time that mRNA is available for translation.
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Four of these five choices are characteristics of sawfly caterpillars. Select the exception
a. vomit in self defense b. prey of birds c. selfish herd d. safety in numbers e. venomous
This scientist is considered to be the father of MICROBIOLOGY because he was the first to visualize microbes using his microscope:
c. Louis Pasteur b. Lazzaro Spallanzani c. Antoine Van Leeuwenhoeck d. Charles Darwin
Which forms of disease are not considered by epidemiology?
a. psychological diseases b. communicable disease c. no forms of disease are ignored d. noncommunicable disease e. drug addictions
What would be the phenotype of an int? mutant?
A) The phage would not be able to undergo the lytic cycle, but could lysogenize. B) Both lytic and lysogenic pathways would be inactivated. C) The phage would be able to enter the lytic cycle, but would not be able to lysogenize. D) The phage would be able to lysogenize but would not be able to be induced to resume the lytic cycle. E) The cell would build up high levels of repressor, so lysogeny would be maintained.