#1
Which of the following is NOT a primary nutritional requirement for microbial growth?
Carbon
Nitrogen
Sulfur
Oxygen
#2
Which of the following is a characteristic of a halophile?
Thrives in high oxygen environments
Thrives in acidic environments
Thrives in high salt environments
Thrives in low temperature environments
#3
Which of the following is NOT a method of sterilization?
Autoclaving
Pasteurization
Filtration
Incubation
#4
Which of the following is an example of a facultative anaerobe?
Streptococcus pyogenes
Mycobacterium tuberculosis
Salmonella enterica
Clostridium tetani
#5
Which of the following is a method of measuring microbial growth?
Bacterial transformation
Enzyme assay
Antibiotic sensitivity test
Serial dilution and viable plate count
#6
What is the optimal pH range for most bacteria to grow?
pH 3-5
pH 6-8
pH 9-11
pH 12-14
#7
Which of the following is an example of an obligate anaerobe?
Escherichia coli
Staphylococcus aureus
Clostridium botulinum
Pseudomonas aeruginosa
#8
What is the term for a microorganism that grows best at low temperatures, typically between 0°C and 20°C?
Thermophile
Mesophile
Psychrophile
Hyperthermophile
#9
What is the term for the process by which bacteria reproduce by dividing into two identical daughter cells?
Binary fission
Conjugation
Transformation
Transduction
#10
Which of the following is a source of micronutrients for microbial growth?
Carbon dioxide
Water
Vitamins
Glucose
#11
Which of the following is NOT a method of measuring microbial growth?
Direct microscopic count
Serial dilution and viable plate count
Turbidity measurement using a spectrophotometer
Gram staining
#12
Which of the following is an example of a chemoheterotroph?
Cyanobacteria
Methanogens
Fungi
Algae
#13
Which of the following is a characteristic of a fastidious microorganism?
Thrives in extreme temperatures
Requires complex nutritional requirements
Resistant to antimicrobial agents
Reproduces rapidly
#14
Which of the following is an example of an autotrophic microorganism?
Rhizobium
Cyanobacteria
Streptococcus
Saccharomyces
#15
Which of the following is an example of a photoautotroph?
Escherichia coli
Mycobacterium tuberculosis
Chlamydomonas reinhardtii
Streptococcus pyogenes