MCQOPTIONS
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MCQOPTIONS
This section includes 375 Mcqs, each offering curated multiple-choice questions to sharpen your Bachelor of Agriculture (BSc agri) knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Reverse isolation would be appropriate for |
| A. | a patient with tuberculosis |
| B. | a patient who has had minor surgery |
| C. | a patient with glaucoma |
| D. | a patient with leukemia |
| Answer» B. a patient who has had minor surgery | |
| 2. |
On soybean which of the following forms symbiotism |
| A. | Azatobactor paspali |
| B. | Rhizobium |
| C. | Nostoc |
| D. | Bradyrhizobium |
| Answer» E. | |
| 3. |
The first antibody to contact invading microorganisms was |
| A. | IgG |
| B. | IgM |
| C. | IgA |
| D. | IgD |
| Answer» C. IgA | |
| 4. |
Who provide the evidence that bacteriophage nucleic acid but not protein enters the host cell during infection |
| A. | Alfred D.Hershey & Leonard Tatum in 1951. |
| B. | Alfred D.Hershey & Zindar Lederberg in 1951. |
| C. | Alfred |
| D. | Hershey & Martha Chase in 1952. |
| Answer» D. Hershey & Martha Chase in 1952. | |
| 5. |
Pick out the vector using in human Genome project |
| A. | Phagemid vector |
| B. | Yeast artificial chromosomes |
| C. | Cosmid vectors |
| D. | Yeast episomal plasmids |
| Answer» C. Cosmid vectors | |
| 6. |
The light emitted by luminescent bacteria is mediated by the enzyme |
| A. | Coenzyme Q |
| B. | Luciferase |
| C. | Lactose dehydrogenase |
| D. | Carboxylase reductase |
| Answer» D. Carboxylase reductase | |
| 7. |
Salt and sugar preserve foods because they |
| A. | Make them acid |
| B. | Produce a hypotonic environment |
| C. | Deplete nutrients |
| D. | Produce a hypertonic environment |
| Answer» E. | |
| 8. |
In a fluorescent microscope the objective lens is made of |
| A. | Glas |
| B. | Quartz |
| C. | Polythene |
| D. | None of these |
| Answer» D. None of these | |
| 9. |
All prokaryotes are surrounded by a cell wall except |
| A. | Mycoplasm |
| B. | Sperochetes |
| C. | Actinomycetes |
| D. | Methanogena |
| Answer» B. Sperochetes | |
| 10. |
The nucleus controls protein synthesis in the cytoplasm by sending |
| A. | Chromatin |
| B. | A DNA template |
| C. | m RNA molecule |
| D. | A pecialized protein |
| Answer» D. A pecialized protein | |
| 11. |
Inclusion bodies diagnostic of rabies are called |
| A. | Elementary bodie |
| B. | Pascheur bodies |
| C. | Negri bodies |
| D. | Guarnieri bodies |
| Answer» D. Guarnieri bodies | |
| 12. |
The major role of minor elements inside living organisms is to act as |
| A. | Co-factors of enzymes |
| B. | Building blocks of important amino acids |
| C. | Constituents of hormones |
| D. | Binder of cell structure |
| Answer» B. Building blocks of important amino acids | |
| 13. |
A bacterium containing prophage is called as |
| A. | Lytic |
| B. | Lysogen |
| C. | Lytogen |
| D. | None of these |
| Answer» C. Lytogen | |
| 14. |
Vrial genome can become integrated into the bacterial genomes are known as |
| A. | Prophage |
| B. | Temperatephage |
| C. | Bacteriophage |
| D. | Metaphage |
| Answer» C. Bacteriophage | |
| 15. |
Rancidity of stored foods is due to the activity of |
| A. | Toxigenic microbes |
| B. | Proteolytic microbes |
| C. | Saccharolytic microbes |
| D. | Lipolytic microbes |
| Answer» E. | |
| 16. |
Rh factor of the blood was discovered by scientist |
| A. | Louis Pasteur |
| B. | Landsteiner and Weiner |
| C. | Janskey |
| D. | Moss |
| Answer» C. Janskey | |
| 17. |
Tumer inducing plasmids are extensively used in production of |
| A. | Avirulent phases |
| B. | Single cell proteins |
| C. | Transgenic plants |
| D. | Nitrogen fixing bacteria |
| Answer» D. Nitrogen fixing bacteria | |
| 18. |
The colonies produced by Pseudomonas on Mac Conkey s medium are |
| A. | Purple colored |
| B. | Pink colored |
| C. | Pale colored |
| D. | Green colored |
| Answer» D. Green colored | |
| 19. |
Staining material of gram positive bacterium is |
| A. | Fast green |
| B. | Haematoxylon |
| C. | Crystal violet |
| D. | Safranin |
| Answer» D. Safranin | |
| 20. |
The anthrax disease is most frequently infected from |
| A. | Cattle |
| B. | Sheeps |
| C. | Rats |
| D. | Both a and b |
| Answer» E. | |
| 21. |
During mitosis, synapsis occurs in the phase called |
| A. | Telophase |
| B. | Anaphase |
| C. | Prophase |
| D. | None of the above |
| Answer» D. None of the above | |
| 22. |
Which of the following change is a transition? |
| A. | ATGC !ATCC |
| B. | ATGC !ATGG |
| C. | ATGC !AGGC |
| D. | None of these |
| Answer» E. | |
| 23. |
Bacter ia that are respons ib le for fermentation of dairy milk are |
| A. | Azetobacter |
| B. | Rhizobium |
| C. | Lactobacillus |
| D. | Hay bacillus |
| Answer» D. Hay bacillus | |
| 24. |
The orderly increase in all components of protoplasm of a cell is called |
| A. | Reproduction |
| B. | Cell division |
| C. | Growth |
| D. | All of the above |
| Answer» D. All of the above | |
| 25. |
The wonder drug of second world war is produced by |
| A. | Algae |
| B. | Fungi |
| C. | Bacteria |
| D. | Plants |
| Answer» C. Bacteria | |
| 26. |
In Streptococcus fecalis, the conjugation takes place at |
| A. | Pili |
| B. | Cell membrane |
| C. | Cell wall |
| D. | Flagella |
| Answer» D. Flagella | |
| 27. |
The Baterium that is most commonly used in genetic engineering is |
| A. | Escherichia |
| B. | Klebsiella |
| C. | Proteius |
| D. | Serratia |
| Answer» B. Klebsiella | |
| 28. |
The bacterial cells are at their metabolic peak during |
| A. | Lag phase |
| B. | Log |
| C. | Stationary |
| D. | Decline |
| Answer» C. Stationary | |
| 29. |
Protein particles which can infect are called |
| A. | Viron |
| B. | Prions |
| C. | Nucleoida |
| D. | None of these |
| Answer» C. Nucleoida | |
| 30. |
Endotoxin produced by gramnegative bacteria is present in |
| A. | Peptidoglycan |
| B. | Lippolysacharide |
| C. | Theichoic acid |
| D. | Inner membrane |
| Answer» C. Theichoic acid | |
| 31. |
Which one of the following is about Herpes viruses? |
| A. | Icosahedral, with envelope, ds DNA |
| B. | Polyhedral with envelope, ds DNA |
| C. | RNA, helical with envelope |
| D. | ds DNA, brick shape |
| Answer» B. Polyhedral with envelope, ds DNA | |
| 32. |
The mode of reproduction which occurs in mycoplasma is |
| A. | Budding |
| B. | Bursting |
| C. | Binary fission |
| D. | Binary fusion |
| Answer» D. Binary fusion | |
| 33. |
A population of cells derived from a single cell are called |
| A. | Monclonal cell |
| B. | Clones |
| C. | Protoplasts |
| D. | Sub culture |
| Answer» C. Protoplasts | |
| 34. |
How would you distinguish pseudomonas species from E-cloi? |
| A. | Gram staining |
| B. | Morphology |
| C. | Glucose fermentation Vs Respiration |
| D. | All of the above |
| Answer» D. All of the above | |
| 35. |
Somatic cell of the adult body are haploid in many except |
| A. | Vertebrate |
| B. | Invertebrates |
| C. | Fungi |
| D. | Vascular plants |
| Answer» D. Vascular plants | |
| 36. |
The enzyme needed in biological systems for joining two molecules is called |
| A. | Lyase |
| B. | Diastases |
| C. | Polymerases |
| D. | Hydrolase |
| Answer» D. Hydrolase | |
| 37. |
Serum sickness reaction was discovered by |
| A. | Marrice Arthu |
| B. | Von perquit |
| C. | Richet |
| D. | Porter |
| Answer» C. Richet | |
| 38. |
Disease that effects many people at different countries is termed as. |
| A. | Sporadic |
| B. | Pandemic |
| C. | Epidemic |
| D. | Endemic |
| Answer» C. Epidemic | |
| 39. |
If the vectors transmit the infection mechanically they are called |
| A. | Biological vectors |
| B. | Mechanical vectors |
| C. | Biological reservoir |
| D. | Both a and c |
| Answer» C. Biological reservoir | |
| 40. |
The virulence of a pathogen is usually measured by |
| A. | LD |
| B. | MLD |
| C. | ID |
| D. | All of the above |
| Answer» E. | |
| 41. |
The lethal dose required to kill 50% of the lab animals tested under standard called |
| A. | ID |
| B. | LD50 |
| C. | ID50 |
| D. | MLD |
| Answer» C. ID50 | |
| 42. |
Which is the following enzyme acts as a spreading factor? |
| A. | Hyaluronidase |
| B. | Coagulase |
| C. | Catalase |
| D. | DNase |
| Answer» B. Coagulase | |
| 43. |
Mycobacterium tuberculosis was first discovered by |
| A. | Robert Koch |
| B. | Edward Jenner |
| C. | Louis Pasteur |
| D. | None of these |
| Answer» B. Edward Jenner | |
| 44. |
Electron microscope gives magnification upto |
| A. | 100 X |
| B. | 2000 X |
| C. | 50,000 X |
| D. | 2,00,000 X |
| Answer» E. | |
| 45. |
First Pasteur conducted fermentation experiments in |
| A. | Milk |
| B. | Food material |
| C. | Fruit juices |
| D. | Both a and c |
| Answer» D. Both a and c | |
| 46. |
Modern concepts of chemotherapy was proposed by |
| A. | Paul Ehrlich |
| B. | Joseph Lister |
| C. | Elie Metchnikoff |
| D. | None of these |
| Answer» B. Joseph Lister | |
| 47. |
The role of phagocytosis was discovered by |
| A. | Paul Ehrlich |
| B. | Joseph lister |
| C. | Elie Metchikoff |
| D. | Pasteur |
| Answer» D. Pasteur | |
| 48. |
The causative organism of rocky mountain spotted fever was first described by |
| A. | Howard Rickett |
| B. | da Rocha-lima |
| C. | Both a and b |
| D. | Robert Koch |
| Answer» D. Robert Koch | |
| 49. |
Viral infection of bacteria was discovered by |
| A. | De Herelle |
| B. | F.W. Twort |
| C. | Beijernick |
| D. | Jwanoksy |
| Answer» C. Beijernick | |
| 50. |
Condensation of light in light Microscope is by |
| A. | Objective |
| B. | Condensor |
| C. | Ocular |
| D. | All of these |
| Answer» C. Ocular | |