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The reactions of glycolysis are catalyzed by enzymes and obviously proceed without much problem. However, when we look at some of the individual steps, they have positive standard free energies. What are these steps and how does the process prevent a blockage of glycolysis at these enzymatic steps?
Assume you isolate a mutant e.coli strain that is unable to grow without tryptophan supplementation at 37 degrees C but grows normally at 25 degrees C.
Some dominant mutations are lethal when homozygous. Why do you think that natural selection fails to eliminate those alleles from the population?
Explain in molecular detail how scientists could develop antibiotics that contact multiple sites on rRNAs and /or r-proteins within the bacterial ribosome.
Genetic variation is important in reproducing populations because it allows the population to adapt to changing environments. Those individuals who are genetically best adapted to an environment have a greater tendency to survive and reproduce.
Assume you are studying three traits in tropical fish: black and white striped pattern is completely dominant to solid color. For eye color, brown eyes are dominant to hazel eyes.
If an AaBBCcdd male ma of ridge-producing genes possible in one of their children? What is the minimum number of ridge-producing genes possible in a child of this couple?
A new drug targets renal function through changing ion transport from the filtrate to the interstitial fluid. This particular medicine blocks active transport of sodium in the nephrons.
About 5 percent of individuals with Down syndrome have a chromosomal translocation in which a third copy of chromosome 21 is attached to chromosome 14. If this translocation occurred in a parent's gonad, how can it lead to Down syndrome in a child.
Inversion or Translocation heterozygotes have difficultyin producing gametes that function properly. Is there a way that an Inversion heterozygote could manufacture functional gametes?
A very heavy rainstorm floods a mountain river, changing its course and digging a deep canyon through the soft soils of the meadow in the valley below. What happens to the mice on either side of the valley?
Three Hfr strains of E. coli are known to transfer their genetic material during conjugation in different sequences. Given the time of entry of the markers into the F- recipient,
In the figure below, suppose the left-hand individual is selfed. What pattern of radioactive bands would you see in a Southern analysis of the progeny?
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