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A regulator gene-minus strain of E. coli is constitutive for expression of the lac-operon because the repressor cannot bind tothe operator region even when lactose is present. By bacterialconjugation, it is possible to introduce into the regulator-minusstrain a wild type or regulator-plus gene, which can betranscribed.What effect does lactose have on expression of the lac-operon in the bacteria containing both types of regulator genes? Explain youranswer.
Purine biosynthesis is allowed to take place in the presence of [N15]aspartate, and the newly synthesized GTP and ATP are isolated. What positions are labeled in the two nucleotides.
produce a family tree for at least three generations of a famous family such as the martin luther kingbushes clintons
What will happen to the GFR and urine output if plasma protein production decreases (due to hepatitis, cirrhosis, or dietary protein deficit)?
A dry gas sample has been extracted from a well and analyzed via GC to have the given mole fractions: 0.91 methane, 0.035 propane.
Predict the results you would expect if only a small piece of beef liver (as opposed to beef liver puree) was placed in various concentrations of H2O2
distinguish C3 photosynthesis from C4 photosynthesis and name the enzymes, chemicals, and plants of both groups
A patient has been brought to you who is thought to have a mutation of the DVL1 gene, a human homologue of the Drosophila Disheveled gene.
a new strain of avian bird virus has popped up in china and has health officials at the world health organization are
Explain why warm-up exercises increase myosin-ATPase activity. Describe how increasing myosin-ATPase activity affects muscle contraction.
inflammatory process that is acute or chronic, local orsystemic, Which of the other emerging infectious diseases has similar lesions
Draw a diagram of the nitrogen cycle with labels describing the metabolic processes. Give examples of bacteria that carry out each of these metablic processes.
In a population of flowers growing in a meadow, C1and C2 are autosomal codominant alleles that control flower color. The alleles are polymorphic in the population.
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