Barr bodies are inactivated X chromosomes
Indicate whether the statement is true or false
TRUE
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Positive cooperativity would most likely be observed when a protein is:
A. a single polypeptide with a Kd = 10-10. B. a single polypeptide with three ligand-binding sites of increasing Kd values. C. comprised of two identical subunits, each of which binds ligand. D. comprised of two ligand-binding sites where the Kd for the second site decreases after the first ligand binds. E. comprised of subunits A and B, where ligand binding to A facilitates ligand binding to B.
The above figure is a photograph of
a. plant with root nodules. b. mycorrhizae. c. root hairs. d. demonstration of the effect of mutualistic Rhizobium. e. microscopic view of a nodule forming around area where the bacterium infect.
Using the information in the accompanying figure, explain what short polypeptide is produced from the DNA segment
AAG GGC CTT. Include in your answer the role of mRNA and tRNA. What will be an ideal response?
Generally, the homicide rate is higher in cities with large populations than in smaller municipalities. How, then, would you characterize homicides as population-controlling factors?
A) They are like floods. B) They are like infectious diseases. C) They are unlike famine. D) They are unlike parasites.