89001. To select cholera-causing bacterium, Vibrio cholerae, the pH of the medium is maintained at a pH of
89002. For the selection of endospore-forming bacteria, a mixed culture can be heated at
89003. The concentration of agar to obtain semi solid media is
89004. Which of the following bacteria dies quickly after drying?
89005. Mac-Conkey medium is an example of
89006. Pseudomonas aeruginosa forms a blue water soluble pigment called
89007. Agar is used for solidifying culture media because
89008. For the selection of lactobacilli present in cheddar cheese, the pH of the medium is maintained at
89009. A disease producing species occurring in a mixed culture can often be selected on the basis of its
89010. Important example(s) of enriched medium/media is/ are
89011. Cell counting can be carried out by
89012. Which of the following techniques may be performed quantitatively to determine the number of bacteria of a particular type?
89013. Intestinal bacteria can grow in the presence of __________ whereas nonintestinal bacteria are usually inhibited.
89014. Which of the following problem makes it impossible to satisfy all of Koch's postulates?
89015. A medium containing crystal violet dye plus sodium deoxycholate will allow
89016. Which of the following bacteria can grow in alkaline pH?
89017. All bacteria that inhabit the human body are
89018. When a substance is added to a liquid medium which inhibits the growth of unwanted bacteria and favors the growth of wanted bacteria, it is known as
89019. Which of the following methods is most likely to be quantitative?
89020. Which of the following hint(s) suggest/s that a given specimen is likely to contain anaerobic bacteria?
89021. Viable plate count can be obtained using
89022. In the pour plate method, the mixed culture is diluted directly in tubes of
89023. Treponema species from human oral cavity can be selected by using
89024. 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
89025. Peptone water and nutrient broth are
89026. Stuart's transport medium is used for transport of specimen containing
89027. Plate counts are often reported as
89028. The medium which allows the growth of more than one microorganisms of interest but with morphologically distinguishable colonies is known as
89029. Selective media facilitate growth of only one kind of organism. Saboraud medium is used to selectively isolate
89030. Which of the following bacteria can grow in acidic pH?
89031. Cell size and cell number can be measured using
89032. Which of the following is used for the proper maintenance and preservation of pure cultures?
89033. In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at
89034. The solidifying agent commonly used in preparation of media is/are
89035. Area is expressed in-units
89036. A foundation in the form of thick reinforced concrete slab covering.The entire area of bottom of the structure is known as
89037. Volume of bucket is given by:
89038. Area of equilateral triangle is:
89039. The thedolite is an instrument used for measuring very accurately
89040. The most toxic exotoxin is
89041. Which of the following species of Clostridium is predominantly sacchrolytic?
89042. Stormy clot reaction is useful in identification of
89043. Food poisoning strains of Clostridium perfringens belong to
89044. Reddening of meat in cooked meat broth is produced by
89045. Clostridium botulinum food poisoning is due to
89046. Drumstick appearance is characteristic of
89047. Blackening of meat in cooked meat broth is through
89048. Typical drumstick appearance of bacilli is generally seen in
89049. Which of the following(s) is/are obligate anaeorbes?
89050. Which of the following types of Clostridium perfringens produces alpha toxin most abundantly?
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