MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 533 Mcqs, each offering curated multiple-choice questions to sharpen your Dairy Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
To combat bacteria, types of viruses used are known as |
| A. | tobacco mosaic virus |
| B. | hybrid virus |
| C. | bacteriophages |
| D. | influenza virus |
| Answer» D. influenza virus | |
| 252. |
In adverse conditions, Bacteria starts |
| A. | dividing |
| B. | copying the Deoxyribonucliec acid |
| C. | forming a thick walled spore |
| D. | copying the Ribonucliec acid |
| Answer» D. copying the Ribonucliec acid | |
| 253. |
The commonest species of Bacteroides in fragilis group, which causes human infection, is |
| A. | B vulgatus |
| B. | B fragilis |
| C. | B ovatus |
| D. | B merdae |
| Answer» C. B ovatus | |
| 254. |
C.perfringens is the major causative agent of __________________ |
| A. | botulism |
| B. | tetanus |
| C. | gas gangrene |
| D. | anthrax |
| Answer» D. anthrax | |
| 255. |
Other name for 'pertussis' is |
| A. | Cough |
| B. | Cold cough |
| C. | Whooping cough |
| D. | Fever |
| Answer» D. Fever | |
| 256. |
Which of the following can be used to detect clumping factor? |
| A. | tube coagulase test |
| B. | slide coagulase test |
| C. | precipitation test |
| D. | none of these |
| Answer» C. precipitation test | |
| 257. |
In death phase there is a remarkable decrease in number of |
| A. | Bacteria |
| B. | Viable bacteria |
| C. | Dividing bacteria |
| D. | Progeny |
| Answer» C. Dividing bacteria | |
| 258. |
Individuals suffering from primary atypical pneumonia have agglutinins to |
| A. | Streptococcus MG |
| B. | S avium |
| C. | S mutans |
| D. | Enterococcus faecalis |
| Answer» B. S avium | |
| 259. |
The term obligate anaerobe refers to an organism that |
| A. | doesn't use oxygen but tolerates it |
| B. | is killed by oxygen |
| C. | uses oxygen when present or grows without oxygen when oxygen is absent |
| D. | prefers to grow without oxygen |
| Answer» C. uses oxygen when present or grows without oxygen when oxygen is absent | |
| 260. |
The primary stain of Gram's method is |
| A. | safranin |
| B. | phenolpthalene |
| C. | crystal violet |
| D. | methyl red |
| Answer» D. methyl red | |
| 261. |
Spherical-shaped bacteria are referred as |
| A. | cocci |
| B. | bacilli |
| C. | spirilla |
| D. | vibrio |
| Answer» B. bacilli | |
| 262. |
A bacterial defense mechanism against bacteriophage is called |
| A. | concatamerization |
| B. | polymerization |
| C. | restriction |
| D. | lysogeny |
| Answer» D. lysogeny | |
| 263. |
Brucella are |
| A. | Cocci |
| B. | Rods |
| C. | Cocobacilli |
| D. | Very short rods |
| Answer» E. | |
| 264. |
The bacteria which is microaerophilic on primary isolation, is |
| A. | M fortuitum |
| B. | Mycobacterium tuberculosis |
| C. | M bovis |
| D. | none of these |
| Answer» D. none of these | |
| 265. |
Koch's postulates were satisfied for the first time with |
| A. | Clostridium tetani |
| B. | Corynebacterium diphtheriae |
| C. | Bacillus anthracis |
| D. | Salmonella typhi |
| Answer» D. Salmonella typhi | |
| 266. |
Which of the following bacteria is moderately saccharolytic? |
| A. | Bacteriodes fragilis |
| B. | B gingivalis |
| C. | B melaninogenicus |
| D. | B levii |
| Answer» D. B levii | |
| 267. |
Ascoli's thermoprecipition test helps in confirming the laboratory diagnosis of |
| A. | tetanus |
| B. | anthrax |
| C. | typhoid |
| D. | cholera |
| Answer» C. typhoid | |
| 268. |
L.flagellatum performs the function of synthesizing _______________ |
| A. | vitamins |
| B. | hormones |
| C. | organic acids |
| D. | folic acid and toxins |
| Answer» E. | |
| 269. |
Which of the following genus of bacteria causes gastroenteritis in humans? |
| A. | Salmonella |
| B. | Enterobacter |
| C. | Escherichia |
| D. | Shigella |
| Answer» D. Shigella | |
| 270. |
Which one is true about bacteria |
| A. | can be seen with naked eye |
| B. | are in the form of pupa |
| C. | are larger than virus |
| D. | can only be controlled through bacteriophages |
| Answer» D. can only be controlled through bacteriophages | |
| 271. |
Reproduction of bacteria, usually undergoes |
| A. | a sexual reproduction |
| B. | a binary fission |
| C. | a budding |
| D. | an asexual reproduction |
| Answer» C. a budding | |
| 272. |
Cell wall protein of Streptococcus pyogenes crossreacts with human |
| A. | synovial fluid |
| B. | cardiac valves |
| C. | myocardium |
| D. | vascular intima |
| Answer» D. vascular intima | |
| 273. |
The halophilic bacteria is/are |
| A. | V. alginolyticus |
| B. | V. vulnificus |
| C. | Vibrio parahaemolyticus |
| D. | All of these |
| Answer» E. | |
| 274. |
T-even phage binding to E. coli probably involves |
| A. | electrostatic interaction |
| B. | hydrophobic interaction |
| C. | covalent bonds |
| D. | all of these |
| Answer» B. hydrophobic interaction | |
| 275. |
Example of a Saprophytic bacteria is |
| A. | M xenopi |
| B. | Msmegmatis |
| C. | Mycobacterium chelonei |
| D. | M marinum |
| Answer» C. Mycobacterium chelonei | |
| 276. |
'Urethritis' is caused by |
| A. | Mycobacterium |
| B. | Vibrio |
| C. | Proteus |
| D. | Chlamydia |
| Answer» E. | |
| 277. |
The organisms belonging to the genus Deinococcus forms colonies of which color? |
| A. | colourless |
| B. | blue |
| C. | red |
| D. | violet |
| Answer» D. violet | |
| 278. |
Contractile sheath of the tail is present in which of the following phages? |
| A. | T3 |
| B. | T2 |
| C. | P22 |
| D. | All of these |
| Answer» C. P22 | |
| 279. |
Implicit factors |
| A. | depend on developing microflora |
| B. | can be synergistic |
| C. | both (a) and (b) |
| D. | none of the above |
| Answer» D. none of the above | |
| 280. |
The causative agent of Buruli ulcer is |
| A. | M chelonei |
| B. | M marinum |
| C. | M fortuitum |
| D. | M ulcerarts |
| Answer» E. | |
| 281. |
Brocothrix is a facultatively anaerobic genus of species. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» B. False | |
| 282. |
Which of the following is an important characteristic of bacteria belonging to Zoogloea? |
| A. | They are plant pathogens |
| B. | Cells are embedded in a gelatinous matrix |
| C. | Cause diseases in humans |
| D. | Useful for industrial applications |
| Answer» C. Cause diseases in humans | |
| 283. |
The Rickettsias and Chlamydias are similar in all respects. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 284. |
The violet pigement, violacein, is produced by which of the following bacterial genus? |
| A. | Zymomonas |
| B. | Gardnerella |
| C. | Streptobacillus |
| D. | Chromobacterium |
| Answer» E. | |
| 285. |
Which of the following infect arthropods only? |
| A. | Rickettsieae |
| B. | Ehrlichieae |
| C. | Wolbachieae |
| D. | Rochalimaea |
| Answer» D. Rochalimaea | |
| 286. |
Veillonellaceae, is the family of bacteria consisting of motile cocci. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 287. |
The organic acids produced by bacteria belonging to the family Bacteriadaceae is identified by? |
| A. | distillation |
| B. | gas chromatography |
| C. | spectrophotometer |
| D. | ion-exchange chromatography |
| Answer» C. spectrophotometer | |
| 288. |
Which of the following genus of bacteria do not have a fermentative type of metabolism? |
| A. | Bacteroides |
| B. | Fusobacterium |
| C. | Wolinella |
| D. | Selenomonas |
| Answer» D. Selenomonas | |
| 289. |
Propionate and acetate are produced as an end product of fermentation in which of the following bacteria? |
| A. | Fusobacterium |
| B. | Succinimonas |
| C. | Wolinella |
| D. | Anaerovibrio |
| Answer» E. | |
| 290. |
Desulphuromonas can respire with elemental sulphur as the electron acceptor. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» B. False | |
| 291. |
Main reservoir for bacteria 'Campylobacter' is |
| A. | Human |
| B. | Pigs |
| C. | Poultry |
| D. | Goats |
| Answer» D. Goats | |
| 292. |
Which of the following can be identified by milk ring test? |
| A. | Brucellosis |
| B. | Salmonellosis |
| C. | Bovine tuberculosis |
| D. | All of these |
| Answer» B. Salmonellosis | |
| 293. |
Penicillin causes inhibition of Mycoplasmas. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 294. |
Which of the following biotypes of Vibrio cholerae are prevalent in India? |
| A. | EI Tor |
| B. | Classical |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» B. Classical | |
| 295. |
Which of the following is not the characteristic of a growth curve? |
| A. | Shows development of microbial population under relatively stable environmental conditions |
| B. | Plotted with logarithmic numbers |
| C. | Graphs numbers of microbes versus time |
| D. | Each growth curve consists of four distinct phases |
| Answer» E. | |
| 296. |
Enterobacteriaceae possesses endoflagella. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 297. |
Gram-negative bacterium is/are |
| A. | Escherichia |
| B. | Clostridia |
| C. | Staphylococci |
| D. | All of these |
| Answer» B. Clostridia | |
| 298. |
Which of the following possess peritrichous flagella? |
| A. | Bacteroides |
| B. | Anaerovibrio |
| C. | Succinimonas |
| D. | Fusobacterium |
| Answer» B. Anaerovibrio | |
| 299. |
Which of the following family of bacteria are pathogenic for citrus and other plants? |
| A. | Mycoplasmataceae |
| B. | Acholeplasmataceae |
| C. | Spiroplamataceae |
| D. | Anaplasmataceae |
| Answer» D. Anaplasmataceae | |
| 300. |
The term facultative anaerobe refers to an organism that |
| A. | doesn't use oxygen but tolerates it |
| B. | is killed by oxygen |
| C. | uses oxygen when present or grows without oxygen when absent |
| D. | requires less oxygen than is present in air |
| Answer» D. requires less oxygen than is present in air | |