Bio Quiz SAL 1

.docx

School

Walden University *

*We aren’t endorsed by this school

Course

311

Subject

Biology

Date

Jan 9, 2024

Type

docx

Pages

9

Uploaded by A+_PsychStudent

Started on Monday, 11 May 2020, 12:30 AM State Finished Completed on Monday, 11 May 2020, 1:10 AM Time taken 40 mins 2 secs Marks 5.00/20.00 Grade 2.50  out of 10.00 ( 25 %) Question  1 Complete Mark 1.00 out of 1.00 Flag question Question text Protein kinases phosphorylate proteins only at certain hydroxyl groups on amino acid side chains. Which of the following amino acids contain side chain hydroxyl groups?   Select one: A. lysine, arginine, and proline B. aspartate, glutamate, and serine C. serine, threonine, and tyrosine D. alanine, asparagine, and serine E. threonine, phenylalanine, and arginine Feedback The correct answer is: serine, threonine, and tyrosine Question  2 Not answered Marked out of 1.00 Flag question Question text The pK of acetic acid is 4.8. What is the approximate pH of an acetate solu tion containing 0.2 M acetic acid and 2 M acetate ion? Select one: A. 5.8 B. 4.8 C. 6.8 D. 10.8 E. 0.48 Feedback
The correct answer is: 5.8 Question  3 Complete Mark 1.00 out of 1.00 Flag question Question text Which of the combinations of laboratory results below indicates compensated metabolic alkalosis? Select one: A.  Low PCO2, normal bicarbonate, high pH B. High PCO2, normal bicarbonate, low pH C. Low PCO2, low bicarbonate, low pH D. Normal PCO2, low bicarbonate, low pH E. High PCO2, high bicarbonate, high pH Feedback The correct answer is: High PCO2, high bicarbonate, high pH Question  4 Complete Mark 0.00 out of 1.00 Flag question Question text The results from the blood amino acid screen show two elevated amino acids. A titration curve performed on one of the elevated species shows two ionizable groups with approximate pKs of 2.0 and 9.5. The most likely pair of elevated amino acids consists of: Select one: A. Lysine and isoleucine B. Histidine and valine C. Leucine and isoleucine D. Aspartic acid and glutamine E. Glutamic acid and threonine Feedback
The correct answer is: Leucine and isoleucine Question  5 Complete Mark 0.00 out of 1.00 Flag question Question text Which of the following amino acids is most compatible with an α-helical structure? Select one: A. Tryptophan  B. Proline C. Alanine D. Cysteine E. Lysine Feedback The correct answer is: Alanine Question  6 Complete Mark 0.00 out of 1.00 Flag question Question text Blood is drawn from a child with severe sickle cell anemia and the hemoglobin protein is degraded for peptide and amino acid analysis. Of the results below, which change in hemoglobin primary structure is most likely to correlate with the clinical phenotype of anemia? Select one: A. val-val-val to val-leu-val B. ile-leu-val to ile-ile-val C. gly-asp-gly to gly-glu-gly D. gly-ile-gly to gly-val-gly E. leu-glu-ile to leu-val-ile Feedback The correct answer is: leu-glu-ile to leu-val-ile Question  7 Complete Mark 0.00 out of 1.00 Flag question Question text Which one of the following amino acids may be classified as a zwitter ion at pH 7.0?
Select one: A. Lysine B. Isoleucine C. Aspartic acid D. Arginine E. Histidine Feedback The correct answer is: Isoleucine Question  8 Complete Mark 0.00 out of 1.00 Flag question Question text In a polypeptide at physiologic pH, hydrogen bonding may occur between ..... Select one: A. the side chains of an aspartyl residue and a glutamyl residue B. the terminal -amino group and the terminal -carboxyl group C. the side chains of a leucine residue and a lysine residue D. the amide group in the peptide bond and an aspartyl side chain E. the SH groups of two cysteine residues Feedback The correct answer is: the SH groups of two cysteine residues Question  9 Complete Mark 1.00 out of 1.00 Flag question Question text Autopsies of patients with Alzheimer’s disease show protein aggregates called neurofibrillary tangles and neuritic plaques in various regions of the brain. These plaques exhibit the characteristic staining of amyloid. Which of the following structural features is the most likely characteristic of at least one protein in these plaques? Select one: A. Disulfide bond crosslinks between polypeptide chains B. A high content of beta-pleated sheet structure C. A high content of alfa-helical structure D. A low-energy native conformation E. A high content of random coils Feedback The correct answer is: A high content of beta-pleated sheet structure Question  10 Complete Mark 1.00 out of 1.00 Flag question
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help