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.
| 201. |
Wilson and Blair bismuth sulphite medium is used for the growth |
| A. | Salmonella typhi |
| B. | Shigella dysenteriae |
| C. | Vibrio cholerae |
| D. | E. coli |
| Answer» B. Shigella dysenteriae | |
| 202. |
Which of the following is most severly affected in Kala-azar? |
| A. | Liver |
| B. | Spleen |
| C. | Adrenal gland |
| D. | Bone marrow |
| Answer» C. Adrenal gland | |
| 203. |
Bacteria which need oxygen for growth are called |
| A. | Thermophilic bacteria |
| B. | Microaerophilic bacteria |
| C. | Facultative anaerobic bacteria |
| D. | Mycobacteria |
| Answer» C. Facultative anaerobic bacteria | |
| 204. |
Transgenic animals are produced when GH gene fused with |
| A. | MT gene |
| B. | GH |
| C. | GRF |
| D. | FIX |
| Answer» B. GH | |
| 205. |
Separation of a single bacterial colony is calle |
| A. | Isolation |
| B. | Separation |
| C. | Pure culturing |
| D. | All of these |
| Answer» B. Separation | |
| 206. |
Streptococci which are destroyed at 60 C for 30 minutes |
| A. | Preptostreptococci |
| B. | Strepto viridans |
| C. | Strepto hemolyticus |
| D. | All of these |
| Answer» E. | |
| 207. |
Animals are naturally immune to infection caused by |
| A. | V. Cholera |
| B. | S.typhosa |
| C. | Both a and b |
| D. | None of these |
| Answer» D. None of these | |
| 208. |
If more than one kind of immunizing agent is included in the vaccine, it is |
| A. | Cellular vaccine |
| B. | Recombinant vaccine |
| C. | Mixed vaccine |
| D. | Toxoid vaccine |
| Answer» D. Toxoid vaccine | |
| 209. |
Plasmids are ideal vectors for gene cloning as |
| A. | They can be multiplied by culturing |
| B. | They can be multiplied in the laboratory using enzymes |
| C. | They can replicate freely outside the bacterial cell |
| D. | They are self replicating within the bacterial cell |
| Answer» E. | |
| 210. |
The most important function of a gene is to synthesize |
| A. | Enzyme |
| B. | Hormones |
| C. | RNA |
| D. | DNA |
| Answer» B. Hormones | |
| 211. |
one of the standard cloning vector widely used in gene cloning is |
| A. | Ti pasmid |
| B. | EMBL 3 |
| C. | pBR 322 |
| D. | EMBL 4 |
| Answer» D. EMBL 4 | |
| 212. |
Thin blood smear for malaria is used to identify |
| A. | Plasmodium |
| B. | Gametocytes |
| C. | Type of parasite |
| D. | Schizont |
| Answer» D. Schizont | |
| 213. |
Infection that results in pus formation are called |
| A. | Focal infection |
| B. | Acute infection |
| C. | Pyogenic infection |
| D. | Chronic infection |
| Answer» D. Chronic infection | |
| 214. |
The formation spindle fibres in the process of cell division is prevented by |
| A. | Corchicine |
| B. | ATP |
| C. | Hydrazine |
| D. | All of these |
| Answer» D. All of these | |
| 215. |
All of the following drugs act on cell membrane, except |
| A. | Novobiocin |
| B. | Nystatin |
| C. | Chloromycetin |
| D. | Colicins |
| Answer» E. | |
| 216. |
Wilson and Blair medium is used for isolation of |
| A. | Staphylococci |
| B. | Salmonella typhosa |
| C. | Vibrio cholerae |
| D. | Shigella shigae |
| Answer» C. Vibrio cholerae | |
| 217. |
Resistant to drugs in tuberculosis develops by |
| A. | Transduction |
| B. | Transformation |
| C. | Conjugation |
| D. | Mutation |
| Answer» E. | |
| 218. |
All the antibodies produced from a -cell are having |
| A. | Similar specificity |
| B. | Different specificities |
| C. | Similar size |
| D. | None of these |
| Answer» B. Different specificities | |
| 219. |
Monoclonal antibodies are associated with the name of |
| A. | Burnet |
| B. | Medwar |
| C. | Milstein kohler |
| D. | Owen |
| Answer» B. Medwar | |
| 220. |
Enterotoxin responsible for food poisoning is secreted by |
| A. | Enterococci |
| B. | Entamoeba histolytica |
| C. | Enterobacteriaceae |
| D. | Straphylococci |
| Answer» E. | |
| 221. |
The medium used in membrane filter technique was |
| A. | EMB agar |
| B. | EMR-Vp medium |
| C. | Lactose broth |
| D. | Endo agar |
| Answer» C. Lactose broth | |
| 222. |
Following is the marker of HIV infection in blood: |
| A. | Reverse transcriptase |
| B. | DNA polymerase |
| C. | RNA polymerase |
| D. | None of these |
| Answer» B. DNA polymerase | |
| 223. |
The stalked particles on the cristae of mitochondria are called |
| A. | Glyoxysome |
| B. | Peroxisomes |
| C. | Oxysomes |
| D. | Spherosomes |
| Answer» C. Oxysomes | |
| 224. |
Drug resistance in bacteria is mainly determined by factor: |
| A. | F |
| B. | R |
| C. | Col |
| D. | Lysogenic factor |
| Answer» E. | |
| 225. |
Western blotting is the technique used in the determination of |
| A. | RNA |
| B. | DNA |
| C. | Proteins |
| D. | All of these |
| Answer» C. Proteins | |
| 226. |
Drug resistance to sulphonamides is due to |
| A. | Production of PABA |
| B. | Folic acid synthetase |
| C. | Drug alteration |
| D. | Low affinity for drug synthesis by bacteria |
| Answer» C. Drug alteration | |
| 227. |
Bacilli Calmette Guerin (BCG) contains the avirulent strains of |
| A. | Human tubercle bacilli |
| B. | Avian tubercle bacilli |
| C. | Bovine tubercle bacilli |
| D. | A typical mycobacteria |
| Answer» D. A typical mycobacteria | |
| 228. |
V itam in B12 can be estimated and determined by using organism |
| A. | Lactobacillus sps |
| B. | Lactobacillus Leichmanni |
| C. | Bacillus subtilis |
| D. | E.Coli |
| Answer» C. Bacillus subtilis | |
| 229. |
The purification and recovery of the production after fermentation is called |
| A. | Upstream process |
| B. | Downstream process |
| C. | Surface fermentation |
| D. | None of these |
| Answer» C. Surface fermentation | |
| 230. |
Nitrites are oxidized to nitrates by a microorganism |
| A. | Nitrosomona |
| B. | Nitrosococcus |
| C. | Nitrobacter |
| D. | Azatobacter |
| Answer» D. Azatobacter | |
| 231. |
The drug of choice for dermal, oral and vaginal candidiasis is |
| A. | Griseofulvin |
| B. | Amphotericin B |
| C. | Gentian violet |
| D. | Nystatin |
| Answer» D. Nystatin | |
| 232. |
For the separation of antigens the method used is |
| A. | Immunoelectrophoresis |
| B. | Flocculation |
| C. | Agglutination |
| D. | None of these |
| Answer» B. Flocculation | |
| 233. |
Lederberg and Tatum (1946) described the phenomena of |
| A. | Conjunction |
| B. | Transformation |
| C. | Mutation |
| D. | Plasmids |
| Answer» B. Transformation | |
| 234. |
Out of the following which are the examples of autoimmune disease? |
| A. | Acquired Haemolytic anaemia |
| B. | Rheumatoid arthritis |
| C. | Hashiomoto disease |
| D. | All of these |
| Answer» E. | |
| 235. |
In genetic engineering breaks in DNA are formed by enzymes known as |
| A. | Restriction enzymes |
| B. | Ligases |
| C. | Nucleases |
| D. | Hydralases |
| Answer» C. Nucleases | |
| 236. |
The enzymes which are commonly used in genetic engineering are |
| A. | Exonuclease and ligase |
| B. | Restriction endonuclease and polymerase |
| C. | Ligase and polymerase |
| D. | Restriction endonuclease and ligase |
| Answer» B. Restriction endonuclease and polymerase | |
| 237. |
To be antigen, the chemical molecule (protein) needs |
| A. | High molecular weight |
| B. | Chemical complexity |
| C. | Both a and b |
| D. | None of these |
| Answer» D. None of these | |
| 238. |
Over heating of fermentator during fermentation is controlled by |
| A. | Cooling jacket |
| B. | Steam |
| C. | Cool air |
| D. | None of these |
| Answer» B. Steam | |
| 239. |
Crossing-over most commonly occurs during |
| A. | Prophase I |
| B. | Prophase II |
| C. | Anaphase I |
| D. | Telophase II |
| Answer» B. Prophase II | |
| 240. |
The bases Adenine and Thymine are paired with |
| A. | Double hydrogen bonds |
| B. | Single hydrogen bonds |
| C. | Triple hydrogen bonds |
| D. | Both b and c |
| Answer» B. Single hydrogen bonds | |
| 241. |
The drug of choice in anaphylactic shock is |
| A. | Histamine |
| B. | Corticosteroid |
| C. | Epinephrine |
| D. | None of these |
| Answer» D. None of these | |
| 242. |
The following disease are caused by Mycoplasma except |
| A. | Pneumonia in human beings |
| B. | Little leaf of Brinjal |
| C. | Dwarf disease of Mulbery |
| D. | Citrus canker |
| Answer» E. | |
| 243. |
The main product of glycolysis under aerobic conditions is |
| A. | Pyruvate |
| B. | Lactate |
| C. | None of these |
| D. | Both a and b |
| Answer» B. Lactate | |
| 244. |
Drug of choice for methicillin resistant staph. Aureus is |
| A. | Ampicillin |
| B. | Erythromycin |
| C. | Neomycin |
| D. | Vancomycin |
| Answer» E. | |
| 245. |
Of the following, this is a capsulated organism |
| A. | Bacillus anthraci |
| B. | Escherichia-coli |
| C. | Corynebacterium |
| D. | Brucella |
| Answer» B. Escherichia-coli | |
| 246. |
The points at which crossing over has taken place between homologus chromosomes are called |
| A. | Chiasmata |
| B. | Synaptonemal complex |
| C. | Centromeres |
| D. | Protein axes |
| Answer» B. Synaptonemal complex | |
| 247. |
Wh ich of the fo l low ing induces dimerisation of thymine? |
| A. | X-ray |
| B. | U.V. rays |
| C. | -rays |
| D. | None of these |
| Answer» C. -rays | |
| 248. |
To be anaphylactic, the sensitizing substance should be |
| A. | Protein in nature |
| B. | Should have a large molecular weight |
| C. | Soluble in tissue fluids |
| D. | All of the above |
| Answer» C. Soluble in tissue fluids | |
| 249. |
Following substance may act as an antigen |
| A. | Egg albumin |
| B. | RBC and serum |
| C. | Vegetable protein |
| D. | Snake venom |
| Answer» D. Snake venom | |
| 250. |
The main difference in true bacteria and mycoplasma is that it does not posses |
| A. | Flagella |
| B. | Cell wall |
| C. | ATP synthesis |
| D. | A capsule |
| Answer» C. ATP synthesis | |