MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Shadow casting is a technique of visualizing ___________________ |
| A. | isolated particles |
| B. | mounts |
| C. | shoot tips |
| D. | root tips |
| Answer» B. mounts | |
| 2. |
A protein is neutral at the isoelectric point. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 3. |
Molecular beacons are short ____________________ |
| A. | polysaccarides |
| B. | monosaccharides |
| C. | oligonucleotides |
| D. | phospholipids |
| Answer» D. phospholipids | |
| 4. |
Which of the following enzymes in bacteria are responsible for restricting the growth of viruses? |
| A. | restriction endonuclease |
| B. | topoisomerase |
| C. | gyrase |
| D. | protease |
| Answer» B. topoisomerase | |
| 5. |
Which technique is used to separate nucleic acids of size greater than 25 kb? |
| A. | SDS-PAGE |
| B. | Pulsed-field electrophoresis |
| C. | 2D- gel electrophoresis |
| D. | Isoelectric focusing |
| Answer» C. 2D- gel electrophoresis | |
| 6. |
Image formation in electron microscope is based on ___________________________ |
| A. | column length |
| B. | electron number |
| C. | differential scattering |
| D. | specimen size |
| Answer» D. specimen size | |
| 7. |
Which type of gel is used for large nucleic acids? |
| A. | acrylamide |
| B. | cellulose |
| C. | agarose |
| D. | sephadex |
| Answer» D. sephadex | |
| 8. |
Isotopes have the same number of protons. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 9. |
MALDI is a technique of ______________________ |
| A. | ionization |
| B. | fractionation |
| C. | proteolysis |
| D. | cell counting |
| Answer» B. fractionation | |
| 10. |
Which of the following emitted particles consists of two protons? |
| A. | alpha |
| B. | beta |
| C. | gamma |
| D. | zeta |
| Answer» B. beta | |
| 11. |
One Svedberg unit is equivalent to 10¯¹³ ______________ |
| A. | hours |
| B. | minutes |
| C. | seconds |
| D. | milli-seconds |
| Answer» D. milli-seconds | |
| 12. |
In TEM, the tissue is stained by floating on drops of ______________________ |
| A. | hydrocarbons |
| B. | slow-molecular weight stains |
| C. | heavy metal soutions |
| D. | oil immersion |
| Answer» D. oil immersion | |
| 13. |
Electrospray ionization is suited for proteins that are __________________ |
| A. | in matrix |
| B. | in glycerol |
| C. | in solution |
| D. | of large size |
| Answer» D. of large size | |
| 14. |
In SEM, the image is formed by the electrons that _________________ |
| A. | reflect back |
| B. | ionize |
| C. | undergo inversion |
| D. | pass through |
| Answer» B. ionize | |
| 15. |
The yeast two-hybrid system is used for studying ________________________ |
| A. | protein-protein interactions |
| B. | pressure changes |
| C. | molecular size |
| D. | differentiation pattern |
| Answer» B. pressure changes | |
| 16. |
Under favorable conditions, the protoplasts can grow into a ____________________ |
| A. | callus culture |
| B. | organ culture |
| C. | root culture |
| D. | shoot culture |
| Answer» B. organ culture | |
| 17. |
Which of the following molecules can be analyzed using a northern blot? |
| A. | RNA |
| B. | Carbohydrates |
| C. | Proteins |
| D. | DNA |
| Answer» B. Carbohydrates | |
| 18. |
Trypsin is used for dissociating the tissue into single cells. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 19. |
Liquid scintillation spectrometry is a method of detecting ________________________ |
| A. | X-rays |
| B. | α-emitters |
| C. | β-emitters |
| D. | Gamma-rays |
| Answer» D. Gamma-rays | |
| 20. |
The AFM uses a _______________ to scan the surface of a molecule. |
| A. | X-ray film |
| B. | Nanosized tip |
| C. | Non-metal tip |
| D. | Nanodrop |
| Answer» C. Non-metal tip | |
| 21. |
Phenol is an active protein denaturant. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 22. |
Which of the following is used as an ion-exchanger resin? |
| A. | ethanol |
| B. | cellulose |
| C. | starch |
| D. | collagen |
| Answer» C. starch | |
| 23. |
The endonuclease HaeIII recognizes ______________________ sequence. |
| A. | mono-nucleotide |
| B. | bi-nucleotide |
| C. | tri-nucleotide |
| D. | tetra-nucleotide |
| Answer» D. tetra-nucleotide | |
| 24. |
When was the nucleotide sequence of a viral genome first elucidated? |
| A. | 1977 |
| B. | 1988 |
| C. | 1999 |
| D. | 2002 |
| Answer» B. 1988 | |
| 25. |
In gel electrophoresis, the globular proteins move slower than the fibrous proteins. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 26. |
The process of dedifferentiation in cell culture can give rise to ________________________ |
| A. | induced-pluripotent stem cells |
| B. | carcinoma cells |
| C. | single protoplasts |
| D. | fused protoplasts |
| Answer» B. carcinoma cells | |
| 27. |
Which of the following techniques delivers the amino-acid sequence of a peptide? |
| A. | Tandem MS |
| B. | GC-MS |
| C. | LC-MS |
| D. | SDS-PAGE |
| Answer» B. GC-MS | |
| 28. |
In the secondary culture, cells are obtained from _______________________ |
| A. | primary culture |
| B. | the organism |
| C. | organ culture |
| D. | phenotypic culture |
| Answer» B. the organism | |
| 29. |
The identity and chemical properties of an atom are determined by ____________ |
| A. | critical temperature |
| B. | critical freezing point |
| C. | melting temperature |
| D. | number of protons |
| Answer» E. | |
| 30. |
In the liquid column chromatography, there are two phases namely ___________________ and ____________________ |
| A. | mobile, immobile |
| B. | liquid, gel |
| C. | viscous, non-viscous |
| D. | flammable, inflammable |
| Answer» B. liquid, gel | |
| 31. |
Which of the following is used to precipitate the nucleic acids? |
| A. | glycerol |
| B. | ethanol |
| C. | methanol |
| D. | ethylene |
| Answer» C. methanol | |
| 32. |
Gel-filtration chromatography separates proteins based on their ___________________ |
| A. | pH |
| B. | temperature |
| C. | morphology |
| D. | effective size |
| Answer» E. | |
| 33. |
Bacterial artificial chromosomes are the __________________ of bacterial cells. |
| A. | Polymerase enzyme |
| B. | Proteases |
| C. | F-factors |
| D. | Exonucleases |
| Answer» D. Exonucleases | |
| 34. |
In ion-exchange chromatography, proteins bound to the resin can be displaced by increasing the _____________________ |
| A. | strength of ionic buffer |
| B. | size of sample |
| C. | column volume |
| D. | column width |
| Answer» B. size of sample | |
| 35. |
Total nitrogen measurement can be used to measure ____________ |
| A. | pH drift |
| B. | total protein |
| C. | specific enzyme |
| D. | viscosity |
| Answer» C. specific enzyme | |
| 36. |
Polymerase chain reaction (PCR) was invented by ______________________ |
| A. | Kary Mullis |
| B. | James Watson |
| C. | John Hopkins |
| D. | Hargobind Khorana |
| Answer» B. James Watson | |
| 37. |
The scanning electron microscope is used to examine _____________ |
| A. | antigens |
| B. | antibodies |
| C. | anticoaggulants |
| D. | cell surfaces |
| Answer» E. | |
| 38. |
Which technique can be used to separate ¹⁵N and ¹⁴N? |
| A. | Rate-zonal centrifugation |
| B. | Isopycnic centrifugation |
| C. | HPLC |
| D. | Mass spectrometry |
| Answer» C. HPLC | |
| 39. |
The temperature cycles in a polymerase chain reaction are in the order __________________ |
| A. | 95°, 60°, 72° |
| B. | 60°, 72°, 95° |
| C. | 72°, 60°, 95° |
| D. | 95°, 72°, 60° |
| Answer» B. 60°, 72°, 95° | |
| 40. |
cDNA libraries are produced from ______________________ |
| A. | ribonucleic acids |
| B. | messenger RNAs |
| C. | transfer RNAs |
| D. | ribosomal RNAs |
| Answer» C. transfer RNAs | |
| 41. |
The resolving power of TEM is derived from _______________ |
| A. | electrons |
| B. | specimens |
| C. | power |
| D. | ocular system |
| Answer» B. specimens | |
| 42. |
TEM and SEM are the same microscopy techniques. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 43. |
The Feulgen stain is used for staining ____________________ |
| A. | plasma membrane |
| B. | chromosomes |
| C. | phospholipids |
| D. | mitochondria |
| Answer» C. phospholipids | |
| 44. |
During TEM, a vacuum is created inside the _________________________ |
| A. | room of operation |
| B. | specimen |
| C. | column |
| D. | ocular system |
| Answer» D. ocular system | |
| 45. |
The resolution attainable with standard TEM is less than the theoretical value. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 46. |
The cathode of transmission electron microscope consists of a ____________________ |
| A. | tungsten wire |
| B. | bulb |
| C. | iron filament |
| D. | gold wire |
| Answer» B. bulb | |
| 47. |
Unstained specimens can be visualized using ________________ |
| A. | bright-field microscope |
| B. | phase-contrast microscope |
| C. | mass spectroscopy |
| D. | spectrophotometer |
| Answer» C. mass spectroscopy | |
| 48. |
Slides containing adherent paraffin sections are immersed in __________________ |
| A. | toluene |
| B. | isoamyl alcohol |
| C. | isopropanol |
| D. | acetic acid |
| Answer» B. isoamyl alcohol | |
| 49. |
Rhodamine is a ___________________ |
| A. | fluorochrome |
| B. | antibody |
| C. | stain |
| D. | gel type |
| Answer» B. antibody | |
| 50. |
Which of the following gives a three dimensional quality of the image? |
| A. | Differential interference contrast |
| B. | Bright-field microscope |
| C. | Gas chromatography |
| D. | Spectrophotometry |
| Answer» B. Bright-field microscope | |