Recent questions tagged microbiology-and-health

The major class of enzymes catalyzing the cleavage of $C-C, C-O, C-N$, or other bonds by elimination, leaving double bonds or rings, or addition of groups to double bonds...

Malaria is caused by pathogenic $\_\_\_\_\_\_\_$.bacteriafungiprotozoaviruses

Which ONE of the following options is CORRECT with respect to sequential breakdown of deoxyribonucleic acid (DNA) into lower-molecular weight compounds?Deoxyribonucleic a...

A thermal process, at a specific temperature, results in $2-\log _{10}$ removal of non-thermotolerant pathogenic microorganisms from a water sample in $20$ min.The time n...

In a batch culture experiment, $2$ cells of a microorganism were added to a growth medium. During the experiment, a lag phase of $1$ hour was first experienced by the add...

​​​​Which one of the following is performed by autotrophic bacteria?Aerobic biodegradation of organic matterAnaerobic biodegradation of organic matterAerobic nitrificatio...

​​​​​​Choose the correct option(s) from the following regarding the symbiotic relationshipsLichens are a symbiotic association of fungi and bacteria. They can survive in ...

Tuberculosis is predominantly caused by __________.Entamoeba histolyticSalmonella typhiMycobacterium bovisBacillus cereus

Which one of the following conversions belongs to nonsymbiotic nitrogen fixation?Atmospheric nitrogen to ammonia by Rhizobium bacteria in nodules attached to roots of leg...

Crown corrosion of reinforced cement concrete sewer is caused by ___________.sulfur oxidizing bacteriairon oxidizing bacteriadenitrifying bacteriafermentative bacteria

Rod shaped bacterial cells are called ________.BacilliCocciSpirillaDiplococci

Which of the following statement$\text{(s)}$ is/are CORRECT?DNA is composed of nucleotidesFive types of nitrogenous bases occur in DNAEach phosphate is attached to two de...

With reference to disinfection, which of the following statement(s) is/are CORRECT?Ethanol damages lipid structures in the bacterial cell membraneMercuric chloride inacti...

Read the following statementsI. Bacteriophage is an anaerobic bacterium.II. Male-specific bacteriophage infect via the pili of other microorganisms including viruses.III....

Ten litres of the sample was filtered through a membrane filter and the filter was transferred to solid agar media which supports growth of coliform organisms. After incu...

Reverse Transcriptase Polymerase Chain Reaction is an analytical procedure used in detection of pathogenic microorganisms. Which one of the following statements is NOT co...