If a helical turn is removed from a closed-circular DNA molecule:
A. only supercoiling will occur.
B. only strand separation will occur.
C. supercoiling and/or strand separation will occur.
D. cruciform DNA will likely form.
E. solenoidal DNA will likely form.
C
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Research has shown that commercial fisheries place selective pressure on fish populations by harvesting mostly the
____ fish, resulting in ____.
a. young; aging populations b. larger; maturity at smaller sizes c. smaller; maturity at larger sizes d. prereproductive; declining birth rates e. postreproductive; no change in population size
Dietary treatment of galactosemia
A. need not begin until one or two months after birth. B. requires a low protein diet. C. can be discontinued by the age 10?12. D. completely eliminates symptoms of the disease. E. none of these.
Learned behavior that causes a family of baby ducks to follow their mother is called
A. motivation. B. operant conditioning. C. insight learning. D. imprinting. E. extinction.
In your research, you are comparing the transcriptome and the proteome for two related species. One gene in species B has a similar transcript but a much smaller protein than in species A, and the protein seems to be nonfunctional. What do you predict about this gene? (Select all that apply)A) It is a pseudogene.B) It will have an increased number of persistant mutations in species B.C) It probably has a stop codon early in the coding region.D) It probably has a defect in the enhancer region.E) It probably is not methylated correctly.
What will be an ideal response?