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MCQs

Total Questions : 76 | Page 4 of 8 pages
Question 31. Which of the following is not the function of helper T cells is ____________
  1.    Produce soluble signaling proteins called cytokines, which include the interleukins
  2.    They help activate cytotoxic T cells to kill infected target cells
  3.    They help activate B cells to secrete antibodies and macrophages to destroy ingested microbes
  4.    They recognize and bind extracellular ligands
 Discuss Question
Answer: Option D. -> They recognize and bind extracellular ligands
Answer: (d).They recognize and bind extracellular ligands
Question 32. Which of the following is a function of Macrophages?
  1.    Ingest large particles and cells by phagocytes
  2.    Produce and secrete antibodies
  3.    Interact with infected host cells through receptors on T-cell surface
  4.    Interact with macrophages and secrete cytokines
 Discuss Question
Answer: Option A. -> Ingest large particles and cells by phagocytes
Answer: (a).Ingest large particles and cells by phagocytes
Question 33. Which of the following is a function of T lymphocytes?
  1.    Ingest large particles and cells by phagocytes
  2.    Produce and secrete antibodies
  3.    Interact with infected host cells through receptors on T-cell surface
  4.    Interact with macrophages and secrete cytokines
 Discuss Question
Answer: Option C. -> Interact with infected host cells through receptors on T-cell surface
Answer: (c).Interact with infected host cells through receptors on T-cell surface
Question 34. Which of the following is a function of B lymphocytes?
  1.    Ingest large particles and cells by phagocytes
  2.    Produce and secrete antibodies
  3.    Interact with infected host cells through receptors on T-cell surface
  4.    Interact with macrophages and secrete cytokines
 Discuss Question
Answer: Option B. -> Produce and secrete antibodies
Answer: (b).Produce and secrete antibodies
Question 35. The most abundant immunoglobulin is ____________
  1.    IgA
  2.    IgE
  3.    IgG
  4.    IgM
 Discuss Question
Answer: Option C. -> IgG
Answer: (c).IgG
Question 36. Which of the following does not affect the stability of an α-helix?
  1.    Electrostatic repulsion
  2.    Bulkiness
  3.    Interaction between R groups spaced three residues apart
  4.    Occurrence of alanine and glycine residues
 Discuss Question
Answer: Option D. -> Occurrence of alanine and glycine residues
Answer: (d).Occurrence of alanine and glycine residues
Question 37. β-pleated sheets are the examples of _________
  1.    Primary structure
  2.    Secondary structure
  3.    Tertiary structure
  4.    Quaternary structure
 Discuss Question
Answer: Option B. -> Secondary structure
Answer: (b).Secondary structure
Question 38. Which of the following is not true about secondary protein structure?
  1.    The hydrophilic/hydrophobic character of amino acid residues is important to secondary structure
  2.    The ability of peptide bonds to form intramolecular hydrogen bonds is important to secondary structure
  3.    The alpha helix, beta pleated sheet and beta turns are examples of protein secondary structure
  4.    The steric influence of amino acid residues is important to secondary structure
 Discuss Question
Answer: Option A. -> The hydrophilic/hydrophobic character of amino acid residues is important to secondary structure
Answer: (a).The hydrophilic/hydrophobic character of amino acid residues is important to secondary structure
Question 39. A structure that has hydrogen bonds between polypeptide chains arranged side by side is?
  1.    Primary structure
  2.    α-helix
  3.    β-pleated sheets
  4.    Tertiary structure
 Discuss Question
Answer: Option C. -> β-pleated sheets
Answer: (c).β-pleated sheets
Question 40. A coiled peptide chain held in place by hydrogen bonding between peptide bonds in the same chain is?
  1.    Primary structure
  2.    α-helix
  3.    β-pleated sheets
  4.    Tertiary structure
 Discuss Question
Answer: Option B. -> α-helix
Answer: (b).α-helix

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