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Explain the roles of the CAP binding site and the operating site in relationship to the 3 proteins required for growth on lactose. Why aren't these proteins produced all the time? Explain the differences in function when glucose is absent and lactose is present and when glucose is present. What is the lac repressor and what is its function?
Which of the following should NOT be expected to cause a change in the frequencies of alleles in a population?
In performing a blood typing procedure on a patient , if all three anti-sera cause agglutination , what blood type does the person have?
Determine which nephron structure is especially important in the kidney's ability to produce urine of varying concentration?
Suppose a person has spinal cord damage at the cervical level. Would this stop the knee-jerk reflex? How would it affect the plantar (Babinski) reflex?
What is a population? What is a species? You are conducting fieldwork and discover two populations of squirrels living on opposite sides of a lake. How would you design a study to determine, without disturbing the squirrels, whether these two populat..
PKU (phenylketonuria) is an enzyme deficiency disease that only develops in individuals who are homozygous recessive for that gene. An individual with PKU has parents that do not have this disease.
To determine the location of the his- mutation on the E. coli chromosome, interrupted mating experiment was performed with 5 different Hfr strains. The following chart shows the time of entry (minutes, in parentheses) of the wild-type alleles of t..
What basic similarities among mammals and differences between mammals (the ingroup) and reptiles (an outgroup) help support the hypothesis that all mammals share a common ancestor.
Consider a culture into which two E. coli strains are inoculated. Strain A is normal with g=21 min at 37 degrees C, and 42 mins at 27 degrees C. Strain B has a temperature-sensitive mutation, such that g=55 mins at 37 degrees C, and 39 mins at 27 ..
You want to introduce a human gene into a bacterial vector downstream of a bacterial promoter in hopes of producing a large amount of the human protein. Should you use the genomic DNA or the cDNA? Explain your reasoning.
Which enzyme of the Krebs (TCA) cycle is different from the others with respect to its location and where is it located.
Describe in detail how the ribosome uses an mRNA to accurately synthesize a protein in eukaryotic cells.
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