MCQOPTIONS
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MCQOPTIONS
This section includes 53 Mcqs, each offering curated multiple-choice questions to sharpen your Avionics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
DNA- footprinting is a suitable technique for identifying which of the following? |
| A. | Particular t-RNA in mixture |
| B. | Particular mRNA in mixture |
| C. | Protein binding site within DNA |
| D. | Introns within DNA |
| Answer» D. Introns within DNA | |
| 2. |
Which of the following is taken as an assumption in the distributed model? |
| A. | Mass transfer through the immobilized enzyme occurs via molecular diffusion |
| B. | The reaction occurs at every position and the kinetics of the reaction are of the same form as observed for free enzyme. |
| C. | All of the above |
| D. | There is no mass transfer limitation at the outside surface of the spherical immobilized enzyme |
| Answer» D. There is no mass transfer limitation at the outside surface of the spherical immobilized enzyme | |
| 3. |
What would happen if serum is omitted from the ELISA, but all other steps remain same? |
| A. | The OD values would be nearly the same as the assay control |
| B. | Anti-human Ig-conjugate would not bind and be washed away |
| C. | Anti-human Ig-conjugate would bind non-specifically to the ELISA plate |
| D. | Both ( and ( |
| Answer» E. | |
| 4. |
What is the behavior in which T cells and B cells constantly travel throughout the body seeking out and destroying foreign substances? |
| A. | Immune surveillance |
| B. | Antibody-mediated immune response |
| C. | Vaccination |
| D. | Cell-mediated immune response |
| Answer» B. Antibody-mediated immune response | |
| 5. |
In Counter immunoelectrophoresis |
| A. | electrophoresis will drive the antibody and antigen toward each other |
| B. | electrophoresis will drive the antibody and antigen parallel to each other |
| C. | the antibody will migrate towards cathode |
| D. | the antibody will migrate towards anode |
| Answer» B. electrophoresis will drive the antibody and antigen parallel to each other | |
| 6. |
What type of B cell is like a tiny factory that produces antibodies identical to the B cell receptor that bind to the original antigen? |
| A. | Memory cells |
| B. | T cells |
| C. | Macrophages |
| D. | Plasma cells |
| Answer» E. | |
| 7. |
Which is not the method for producing immobilized enzymes with multifunctional reagents? |
| A. | Functional groups are introduced on the support to react co-valently with enzymes |
| B. | Enzymes are adsorbed on the surface active support followed by intermolecular cross linking |
| C. | None of the above |
| D. | Enzymes are cross linked intermolecularly |
| Answer» D. Enzymes are cross linked intermolecularly | |
| 8. |
Radial Immunodiffusion is similar to |
| A. | gel diffusion |
| B. | double-diffusion |
| C. | all of these |
| D. | Ouchterloney technique |
| Answer» C. all of these | |
| 9. |
Which of the following is not the correct answer? |
| A. | Immobilized enzyme may show selectively altered physical properties |
| B. | Immobilized enzyme may show selectively altered chemical properties |
| C. | None of the above |
| D. | Immobilized enzyme may simulate the realistic natural environment where the enzyme come from the cell |
| Answer» D. Immobilized enzyme may simulate the realistic natural environment where the enzyme come from the cell | |
| 10. |
A cell which defends against body cells in which viruses are reproducing is |
| A. | Cytotoxic T cell |
| B. | Exotoxin |
| C. | Suppressor T cell |
| D. | Endotoxin |
| Answer» B. Exotoxin | |
| 11. |
The intraparticle mass transfer resistance can affect the rate of enzyme reaction, if enzymes are immobilized by |
| A. | crosslinking using multifunctional reagents |
| B. | copolymerization or microencapsulation |
| C. | all of the above |
| D. | adsorption |
| Answer» C. all of the above | |
| 12. |
The immobilized technique involving chemical method is |
| A. | non-covalent bond formation dependent |
| B. | covalent bond formation dependent |
| C. | ionic bond formation dependent |
| D. | both ( and ( |
| Answer» C. ionic bond formation dependent | |
| 13. |
Damkohler number(NDa) is |
| A. | the ratio of the minimum reaction rate to the maximum mass transfer rate |
| B. | the ratio of the maximum reaction rate to the maximum mass transfer rate |
| C. | the ratio of the minimum reaction rate to the minimum mass transfer rate |
| D. | the ratio of the maximum reaction rate to the minimum mass transfer rate |
| Answer» C. the ratio of the minimum reaction rate to the minimum mass transfer rate | |
| 14. |
Rocket Immunodiffusion is also known as |
| A. | electroimmunodiffusion |
| B. | gel diffusion |
| C. | none of these |
| D. | double-diffusion |
| Answer» B. gel diffusion | |
| 15. |
Commonly employed water insoluble supports for the covalent attachment of enzyme include |
| A. | polypeptides |
| B. | acrylamide based polymers |
| C. | all of these |
| D. | dextran |
| Answer» D. dextran | |
| 16. |
Lack of reaction to our own human leukocyte antigens (HLAs) is known as? |
| A. | complement system |
| B. | autoimmunity |
| C. | tolerance |
| D. | clonal selection |
| Answer» D. clonal selection | |
| 17. |
If a person is vaccinated against a disease sometime in the past, which of the following is currently in your body? |
| A. | A very high level of antibodies against the disease antigens |
| B. | The disease organism itself and antigens for the disease organism |
| C. | All of the above |
| D. | Memory B lymphocytes for the antigen of this disease organism |
| Answer» D. Memory B lymphocytes for the antigen of this disease organism | |
| 18. |
Antibodies bound to an invading microorganism activate the complement system via |
| A. | metabolic pathway |
| B. | classical pathway |
| C. | Entner-Doudoroff pathway |
| D. | Embden Meyerhof pathway |
| Answer» C. Entner-Doudoroff pathway | |
| 19. |
What is approximatively the half life of 32-Phosphorus? |
| A. | 28 days |
| B. | 14 days |
| C. | 30 days |
| D. | 42 days |
| Answer» C. 30 days | |
| 20. |
The maturation of T cells and the production of particular T cell receptors occurs in the |
| A. | thymus gland |
| B. | thyroid gland |
| C. | all of these |
| D. | testes |
| Answer» B. thyroid gland | |
| 21. |
The immobilization technique involving physical method is |
| A. | non-covalent bond formation dependent |
| B. | covalent bond formation dependent |
| C. | ionic bond formation dependent |
| D. | both ( and ( |
| Answer» B. covalent bond formation dependent | |
| 22. |
To measure the extent to which the reaction rate is lowered because of resistance to mass transfer, the effectiveness factor of an immobilized enzyme, η can be defined as |
| A. | rate if not slowed by diffusion/ reaction rate |
| B. | reaction rate/rate if not slowed by diffusion |
| C. | rate if not slowed by diffusion/ actual reaction rate |
| D. | actual reaction rate/ rate if not slowed by diffusion |
| Answer» E. | |
| 23. |
Which of the following provide specific defense against viruses and bacteria? |
| A. | B cells |
| B. | T cells |
| C. | inflammation |
| D. | Complement |
| Answer» B. T cells | |
| 24. |
What would happen if the anti-human Ig-conjugate is not washed free of the well before the substrate is added? |
| A. | The ELISA would develop normally |
| B. | The ELISA would not develop when the substrate was added |
| C. | None of the above |
| D. | All wells would show uniform over-development due to unbound and excess anti-human Ig enzyme conjugate |
| Answer» E. | |
| 25. |
Polymorphonuclear leukocytes (or PMNs) |
| A. | are derived from bone marrow stem cells |
| B. | can be attracted to the site of an infection following activation of complement |
| C. | all of the above |
| D. | are a type of phagocyte that can engulf and kill bacteria |
| Answer» D. are a type of phagocyte that can engulf and kill bacteria | |
| 26. |
What is the result of an abnormal response of the immune system to part of a person\'s own body? |
| A. | Cancer |
| B. | Passive immunity |
| C. | An autoimmune disease |
| D. | An allergic response |
| Answer» D. An allergic response | |
| 27. |
What type of B cell remains dormant in the body, but can respond rapidly if the same antigen appears again? |
| A. | Memory cells |
| B. | T cells |
| C. | Macrophages |
| D. | Plasma cells |
| Answer» B. T cells | |
| 28. |
The competitive immunoassay can be used |
| A. | to detect antibody associated with allergies (IgE) |
| B. | to detect very small amounts of antigen |
| C. | commonly to detect trace amounts of drugs. |
| D. | both ( and ( |
| Answer» E. | |
| 29. |
Which is not an antigen-presenting cell (or APC)? |
| A. | Polymorphonuclear leukocyte (or PMN) |
| B. | B cell |
| C. | All of the above |
| D. | Dendritic cell |
| Answer» B. B cell | |
| 30. |
Following are the defenses of the colon except |
| A. | fast flow rate |
| B. | sIgA |
| C. | mucus |
| D. | dense resident microbiota |
| Answer» B. sIgA | |
| 31. |
The immune response to a booster vaccine is called a(n) |
| A. | innate response |
| B. | cellular response |
| C. | secondary response |
| D. | primary response |
| Answer» D. primary response | |
| 32. |
RAST test (radio allergosorbent test) is often used to detect |
| A. | antigen associated with allergies (IgE) |
| B. | antibodies associated with allergies (IgE) |
| C. | None of the above |
| D. | bacteriophages |
| Answer» C. None of the above | |
| 33. |
The immobilized enzyme produced by micro encapsulation technique provides |
| A. | smaller surface area |
| B. | an extremely large surface area |
| C. | relatively smaller surface area |
| D. | high amount of solvent |
| Answer» C. relatively smaller surface area | |
| 34. |
Agarose a porous matrix used in various molecular biology technique is made by repetitive units of |
| A. | agarobiose |
| B. | maltose |
| C. | none of these |
| D. | agar |
| Answer» C. none of these | |
| 35. |
Immunological memory is due to |
| A. | long lived B cells that secrete a specific antibody |
| B. | short lived macrophage that can recognize specific pathogens |
| C. | short lived helper T cells that signal macrophage to divide |
| D. | long lived B cells that secrete a specific antigen |
| Answer» C. short lived helper T cells that signal macrophage to divide | |
| 36. |
Macrophages are professional antigen- presenting cells. The protein molecule through which they present antigen in human is |
| A. | interleukin |
| B. | actin |
| C. | CD8 |
| D. | HLA |
| Answer» D. HLA | |
| 37. |
Which of the following is a positively charged matrix for ion exchange chromatography? |
| A. | DEAE cellulose |
| B. | CM cellulose |
| C. | None of these |
| D. | Phosphocellulose |
| Answer» B. CM cellulose | |
| 38. |
Which medium is used for the production of Penicillin using immobilized cells |
| A. | glucose medium |
| B. | 1% peptone medium |
| C. | LB broth |
| D. | Yeast extract medium |
| Answer» B. 1% peptone medium | |
| 39. |
An antigen preparation and an antibody preparation are tested by immunodiffusion. Three bands are found, indicating that |
| A. | the antibody was impure |
| B. | there was more than one antigen |
| C. | there was one antibody and one antigen |
| D. | the temperature was too high |
| Answer» C. there was one antibody and one antigen | |
| 40. |
WHAT_IS_THE_FREQUENCY_OF_MARKER_BEACON_TRANSMISSION??$ |
| A. | 100 MHz |
| B. | 75 MHz |
| C. | 1 GHz |
| D. | 1000 MHz |
| Answer» C. 1 GHz | |
| 41. |
At what height is the auto flare initiated?$ |
| A. | 100 ft |
| B. | 50 ft |
| C. | 25 ft |
| D. | 10 ft |
| Answer» C. 25 ft | |
| 42. |
MLS_has_a_wide_selection_of_channels_to_avoid_interference_with_nearby_airports$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 43. |
What is the position accuracy that can be achieved by satellite guidance systems? |
| A. | 10 m |
| B. | 5 m |
| C. | 0.5 m |
| D. | 1 m |
| Answer» E. | |
| 44. |
What is the velocity at the start of flare maneuver if the approach speed is 130 knots? |
| A. | 2.91 m/s |
| B. | 3 m/s |
| C. | 3.56 m/s |
| D. | 10 m/s |
| Answer» B. 3 m/s | |
| 45. |
What type of controller is used in an auto flare control? |
| A. | Proportional plus derivative |
| B. | Proportional plus integral |
| C. | Proportional plus integral plus derivative |
| D. | Proportional only |
| Answer» C. Proportional plus integral plus derivative | |
| 46. |
What is DH? |
| A. | Distance Height |
| B. | Direct Height |
| C. | Decision Height |
| D. | Direction height |
| Answer» D. Direction height | |
| 47. |
Under what category does zero visibility conditions come? |
| A. | Category I |
| B. | Category II |
| C. | Category III |
| D. | Category IV |
| Answer» D. Category IV | |
| 48. |
The use of autopilot for landing using ILS does not depend on _______ |
| A. | Visibility category |
| B. | ILS ground installation standard |
| C. | Runway lighting installation |
| D. | Weight of the aircraft |
| Answer» E. | |
| 49. |
What is the frequency used by the glide slope transmitter? |
| A. | VHF |
| B. | UHF |
| C. | MF |
| D. | LF |
| Answer» C. MF | |
| 50. |
What is the frequency used by the localizer transmitter? |
| A. | VHF |
| B. | UHF |
| C. | MF |
| D. | LF |
| Answer» B. UHF | |