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Streptococcus A has a protein in the cell wall that provides benefit to the bacteria by way of “molecular mimicry”. Briefly describe what molecular mimicry is, and how it ca lead to long term damage to the human host.
what would be the resulting mRNA and peptide sequence?
The amino acid threonine has a hydroxyl side chain for which the pKa is 8.18. Calculate what fraction of the threonine side chains will carry a negative charge at pH 7.
Compare and contrast the process of making bioethanol from sugar, starch feedstock and lingo-cellulosic feedstock.
What consequences would the presence of such a mutant tRNA have for the translation of the normal genes in this cell?
A pregnant woman is worried about the chances of her child having hemophilia as both she and her husband have paternal grandfathers with hemophilia.What are the likely genotypes of the couple
In a cell containing two chromosome pairs, what would the number of chromosomes be in each of the daughter cells following meiosis in the event of an error in division in which the sister chromatids of one chromosome did not separate during meiosi..
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.
An assured drug that is used to control high blood pressure stimulates K+ excretion in the kidney such that plasma [K+] decreases from a normal value of 5 mM to 2.5 mM. Intracellular [K+] is largely unaffected. What effect this drug will have on the ..
If urine is normally sterile within the urinary bladder, explain two ways in which urine may become contaminated when obtaining a urine culture.
Suppose that a team of scientists exploring in the Amazon discover various novel species of bacteria that use a non-standard nucleotide "X" in DNA.
An ER membrane protein that has an N-terminal signal sequence and a single stop transfer sequence will. Which of the following is NOT a possible target of proteins imported into the ER?
Suppose we use X-ray crystallography to determine the three dimensional structures of leucine and histidine at pH 8. This technique enables the determination of the positions of all the C, N, and O atoms in these two amino acids, but the hydrogen ..
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