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Home⇒ Medical Science⇒ Microbiology⇒ Cell cultures and characteristics
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q1 ⇒ Which of the following bacteria can grow in acidic pH? Lactobacilli [other wrong options] [Discuss in forum] Vibrio cholerae Shigella Salmonella |
Q2 ⇒ Which of the following bacteria dies quickly after drying? Treponema pallidium [other wrong options] [Discuss in forum] Mycobacterium tuberculosis Staphylococcus aureus Pseudomonas aeruginosa |
Q3 ⇒ Intestinal bacteria can grow in the presence of __________ whereas nonintestinal bacteria are usually inhibited. bile salts [other wrong options] [Discuss in forum] low concentration of various dyes sugars low levels of nitrogen |
Q4 ⇒ In the pour plate method, the mixed culture is diluted directly in tubes of liquid agar medium [other wrong options] [Discuss in forum] sterile liquid usually water both (a) and (b) none of these |
Q5 ⇒ For the selection of endospore-forming bacteria, a mixed culture can be heated at 80°C for 10 minutes [other wrong options] [Discuss in forum] 70°C for 10 minutes 60°C for 10 minutes 90°C for 10 minutes |
Q6 ⇒ Cell counting can be carried out by all of the above [other wrong options] [Discuss in forum] direct microscopic count using petroffhansser counting chamber plate counting membrane filter count |
Q7 ⇒ Which of the following hint(s) suggest/s that a given specimen is likely to contain anaerobic bacteria? All of these [other wrong options] [Discuss in forum] Gas in specimen Foul odour Presence of sulphur granules |
Q8 ⇒ The solidifying agent commonly used in preparation of media is/are both (a) and (b) [other wrong options] [Discuss in forum] agar silica gel none of these |
Q9 ⇒ For the selection of lactobacilli present in cheddar cheese, the pH of the medium is maintained at 5.35 [other wrong options] [Discuss in forum] 6.35 4.35 5.75 |
Q10 ⇒ All bacteria that inhabit the human body are heterotrophs [other wrong options] [Discuss in forum] chemolithotrophs autotrophs phototroph |
Q11 ⇒ Stuart's transport medium is used for transport of specimen containing Neisseria gonorrhoeae [other wrong options] [Discuss in forum] Salmonella Vibrio cholerae Shigella |
Q12 ⇒ Which of the following is used for the proper maintenance and preservation of pure cultures? All of the above [other wrong options] [Discuss in forum] Periodic transfer to fresh media Preservation by overlaying cultures with mineral oil Preservation by lyophilization |
Q13 ⇒ Pseudomonas aeruginosa forms a blue water soluble pigment called pyocyanin [other wrong options] [Discuss in forum] chlororaphin pyoverdin β-carotene |
Q14 ⇒ A medium containing crystal violet dye plus sodium deoxycholate will allow gram (-)ve intestinal bacteria to grow [other wrong options] [Discuss in forum] gram (+)ve intestinal bacteria to grow aquatic bacteria to grow none of these |
Q15 ⇒ When a substance is added to a solid medium which inhibits the growth of unwanted bacteria but permits the growth of wanted bacteria, it is known as selective medium [other wrong options] [Discuss in forum] differential medium enriched medium enrichment medium |
Q16 ⇒ Selective media facilitate growth of only one kind of organism. Saboraud medium is used to selectively isolate yeasts [other wrong options] [Discuss in forum] coliform bacteria gram positive bacteria acid fast organisms |
Q17 ⇒ In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at -60 to -78°C [other wrong options] [Discuss in forum] -20 to -30°C -30 to -48°C -48 to -58°C |
Q18 ⇒ Agar is used for solidifying culture media because all of the above [other wrong options] [Discuss in forum] it does not affect by the growth of bacteria it does not add to the nutritive properties of the medium the melting and solidifying points of agar solution are not the same |
Q19 ⇒ Which of the following bacteria can grow in alkaline pH? Vibrio cholerae [other wrong options] [Discuss in forum] Shigella Lactobacilli Salmonella |
Q20 ⇒ Peptone water and nutrient broth are basal media [other wrong options] [Discuss in forum] selective media enriched media none of these |
Or |