The enzyme control tube in an ASO hemolytic assay exhibits no cell lysis. What is the most likely explanation for this?
a. incorrect pH of buffer
b. low ionic strength buffer
c. oxidation of the enzyme
d. reduction of the enzyme
Answer: C
Immunology
- Which of the following represents the primary site where immature T-cells referred to nude or double negative lymphocytes, will be found?
- Which of the following receptor types is used in T-cell independent activation of a virgin B-cell?
- Which of the following surface molecules do cytotoxic lymphocytes use to induce the death of infected host cells?
- If a self-reactive lymphocyte ultimately binds to a self-antigen on tissue cell without co-stimulation, it's function is shut down in a process called?
- Signal transduction proteins send a signal to the nucleus that an cell surface antigen-receptor has bound to its cognate antigen. Which of the following represents the signal transduction proteins found in a T-cell receptor
- Which of the following processes is used in affinity maturation the fine-tuning of an antibody molecule?
- If a memory B-cell is reactivated by its cognate antigen which of the following differentiated cell types can it become?
- B-microglobulin molecule are exclusively associated with which of the following?
- Mhc2 receptors are found on all of the following cells except?
- Differentiating lymphocytes displaying antigen-receptors that cross react with self-molecules will be neutralised and put out of commission by which process?
- Which of the following cells is activated to kill an infected body cell when it displays an invasive antigen presented by an MHC1 receptor?
- Tc cells check each cell to see if ________.
- Which statement is true about T cells?
- Antibody functions include all of the following except ________.
- Select the correct statement about complement.
- There are over ________ different types of antigen receptors.
- Select the correct statement about the function of antibodies.
- The primary immune response ________.
- Clonal selection of B cells ________.
- Natural killer (NK) cells ________.
- Delayed hypersensitivities ________.
- Immediate hypersensitivities ________.
- Helper T cells ________.
- Cytotoxic T cells ________.
- Select the correct statement about active and passive immunity.