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How is it possible for a change in a single amino acid in a protein of 1000 amino acids to destroy its function, even when that amino acid is far away from any binding site?
Explain the slow and fast ways proteins are regulated.
In the DNA of certain bacterial cells, 13% of the nucleotides are adenine. What are the percentages of the other nucleotides?How many chromosomes are in haploid cells? Diploid cells?The DNA in all the cells in our body adds up to about 100 TRILLION total meters of DNA. The sun is 150 billion meters from earth. So the DNA in our bodies could travel from the earth to the sun and back over 300 times. How does all this DNA fit in our cells and in our bodies? How is it organized? Explain how histone charge is critical for chromatin formation.Eukaryotes and prokaryotes handle their RNA differently. Is this advantageous for eukaryotes? How? Is it also a disadvantage? (5' cap, PolyA Tail, introns/exons, separation of transcription and translation spatially, advantage: splicing creates different functional proteins, disadvantage: introns make eukaryotic genomes very large, longer to replicate, bacteria can replicate in 20 minutes, human cells replicate in about a day)
For each of the following anticodon sequences, identify the codon sequence to which it could potentially pair using third base wobble.
Gene R and gene T are genetically linked. Answer the following questions concerning a dihybrid organism with the genotype Rt/rT.
Explain the causes, symptoms, effects of the bulimia and anorexia. Describe the mechanism of their reversible effects. Determine the net change of the Gibbs free energy for a DNA machine.
In a protein sequence, which repeated sequence over a twenty amino acid stretch would most likely lead to insertion of a transmembrane domain into a lipid bilayer.
A population of fifty-thousand around a nuclear facility receives an average wholebody dose of 0.5 rad as a result of an accidental release of radionuclides.
If the horticulturist breeding gardenias succeeds in having a single plant with a particularly advantageous set of traits, which would be her most probable and efficient route to establishing a line of such plants.
A two electron transfer reaction you are studying has a standard state standard reduction potential (Eo') on 0.137V at 37C. What is the equilibrium constant for the reaction (Keq') at 37C.
Early in development, most human cells turn off expression of essential component of telomerase, enzyme responsible for addition of telomere repeat sequences to ends of chromosomes.
Describe the typical muscle spindle (gamma loop) reflex. How does this reflex help to explain rapid adjustments as seen in the Henry, 1953 study?
Assume you infected an E. coli culture with a virulent bacteriophage. Most of the cells lysed, but a few survived - 1x10^-4. You wonder where the resistant bacteria came from.
Which of the following movements is an example of extension? bending forward at the waist, kneeling, raising your arm laterally.
Explain the steps by which DNA sequencing is performed. Using at least one example, of how DNA sequencing has become a valuable tool in forensic medicine and/or biological research.
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