Portage Microbiology (Module 2 Exam) Questions and Answers | Latest Version | 2025/2026 | Correct & Verified

Portage Microbiology (Module 2 Exam) Questions and Answers | Latest Version | 2025/2026 | Correct & Verified What is the term for bacteria that require oxygen to grow? Obligate aerobes What type of bacteria grow best without oxygen? Obligate anaerobes What type of organism can switch between aerobic and anaerobic metabolism? Facultative anaerobe What type of organism thrives in high salt concentrations? Halophile What kind of environment do thermophiles prefer? High temperatures 2 What is the term for organisms that prefer moderate temperatures? Mesophiles What type of bacteria grow best at cold temperatures? Psychrophiles What is the process by which bacteria divide? Binary fission What phase of bacterial growth shows no increase in cell number? Lag phase What phase of bacterial growth involves rapid multiplication? Log phase What phase of bacterial growth shows equal death and growth rates? Stationary phase 3 What phase of bacterial growth involves more dying cells than dividing cells? Death phase What type of medium contains nutrients that support most bacterial growth? General-purpose medium What type of medium contains ingredients that allow certain microbes to grow while inhibiting others? Selective medium What type of medium allows visible distinction between microbial colonies? Differential medium What is the name of the enzyme that breaks down hydrogen peroxide in bacteria? Catalase What pH level is considered optimal for most human pathogens? Around 7 4 What is an organism called if it uses light for energy? Phototroph What term describes organisms that get energy from chemical compounds? Chemotroph What is the term for bacteria that require specific nutrients for growth? Fastidious What term describes bacteria that grow in the presence