The common amino acid residues in B-turis are proline and lysine
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- All of the following prion diseases, involving distortion of the normal a-helix into the abnormal b-pleated sheet structure, can be found in humans, with the exception of: Bovine Spongiform Encephalopathy Kuru (laughing sickness) Gerstmann-Straussler syndrome Fatal Familial Insomnia Creutzfeldt-Jakob diseaseProline has a low frequency of occurrence in B-sheets, why?Which letter represents the target site of furosemide (Lasix)? E- -B
- The genetic disorder sickle-cell anemia occurs when the amino acid valine takes the place of glutamate during translation of a hemoglobin chain. Using the table of codons below, determine the mutation in DNA that produces this disorder. 1st position ✓ U C A G Select one: U C serine phenylalanine phenylalanine serine leucine serine leucine serine leucine leucine leucine leucine isoleucine isoleucine isoleucine methionine Table of mRNA Codons 2nd position valine valine valine valine proline proline proline proline alanine alaninc alanine alanine A tyrosine tyrosine a. CUC changes to C AG b. GAA changes to GUU c. CTT changes to CAT d. C A G changes to CTC stop stop threonine asparagine threonine asparagine threonine threonine histidine histidine arginine arginine glutamine arginine glutamine arginine lysine lysine G cysteine cysteine stop tryptophan aspartate aspartate glutamate glutamate serine serine arginine arginine glycine glycine glycine glycine 3rd position DCMO U С A G U C A G…True or False A bacteriophage that lacks a capsid structure is considered to be viroid.Susceptibility to developing prion diseases arises from a mutation that changes aspartic acid (Asp) to asparagine (Asn). Which nucleotide base changes could make this happen?
- Human cells contain a protein that binds to the 5′ triphosphate groups of RNA. Explain why this protein would be part of the defense against viral infection.Label the following regions on this tRNA molecule, stating the function of each:A gene contains the sequence CGCATACGGTAC that results in the amino acid sequence arg-ile-arq- tyr. A mutation in this gene has a G inserted after the second C in the strand. How will this mutation affect the phenotype? A)This will affect the phenotype because although most of the protein will be identical, the first amino acid will be different. B)This will not affect the phenotype because only the second amino acid is different from the original protein. C)This will not affect the phenotype because the protein will be identical to the original protein. D)This will affect the phenotype because all of the amino acids after the first one will be different from the original protein.
- Explain what is TFIID ?"The four core histones are relatively small proteins with a very high proportion of positively charged amino acids; the positive charge helps the histones bind tightly to DNA, regardless of its nucleotide sequence" is true or false.a variant of the SARS-CoV-2 virus has been found in brazil. this variant contains the mutation K417N, where the amino acid K has been mutated to the amino acid N. K and N refers to the one letter codes of the amino acids. a) state the names of the amino acids K and N. b) state one difference between the properties of these 2 aminoacids