TTU MBIO 3401: Control of Microbial
Growth (Smith) Exam Questions and
Answers (Latest Update 2026)
What are the normal growth conditions for microorganisms? -
correct answer ✅Sea level, temperature 20-40C, neutral pH, 0.9%
salt, ample nutrients.
What are extremophiles? -
correct answer ✅Organisms that can survive in extreme conditions
outside the normal growth window.
What are psychrophiles? -
correct answer ✅Organisms that thrive in extremely cold
environments, with temperatures ranging from 0-20°C.
What are mesophiles? -
correct answer ✅Organisms that grow best at moderate
temperatures, typically ranging from 15-45°C, which is around body
temperature.
What are thermophiles? -
correct answer ✅Organisms that thrive in extremely warm
environments, with temperatures ranging from 40-80°C.
, TTU MBIO 3401: Control of Microbial
Growth (Smith) Exam Questions and
Answers (Latest Update 2026)
What are hyperthermophiles? -
correct answer ✅Organisms that can survive in extremely high
temperatures, ranging from 65-121°C.
What are barophiles/piezophiles? -
correct answer ✅- Organisms adapted to grow at very high
pressure up to 1,000 atm, 110 MaP, and 15,000 psi
- Usually are also psychrophiles because the average temperature
at the ocean floor is 2C.
Barotolerant -
correct answer ✅Organisms that grow well over the range of 1-50
MPa.
Osmolarity -
correct answer ✅Measure of solute molecules in a solution,
inversely related to available water.
What are aquaporins? -
correct answer ✅- Membrane channel proteins that facilitate rapid
water transport across the membrane after than diffusion
Growth (Smith) Exam Questions and
Answers (Latest Update 2026)
What are the normal growth conditions for microorganisms? -
correct answer ✅Sea level, temperature 20-40C, neutral pH, 0.9%
salt, ample nutrients.
What are extremophiles? -
correct answer ✅Organisms that can survive in extreme conditions
outside the normal growth window.
What are psychrophiles? -
correct answer ✅Organisms that thrive in extremely cold
environments, with temperatures ranging from 0-20°C.
What are mesophiles? -
correct answer ✅Organisms that grow best at moderate
temperatures, typically ranging from 15-45°C, which is around body
temperature.
What are thermophiles? -
correct answer ✅Organisms that thrive in extremely warm
environments, with temperatures ranging from 40-80°C.
, TTU MBIO 3401: Control of Microbial
Growth (Smith) Exam Questions and
Answers (Latest Update 2026)
What are hyperthermophiles? -
correct answer ✅Organisms that can survive in extremely high
temperatures, ranging from 65-121°C.
What are barophiles/piezophiles? -
correct answer ✅- Organisms adapted to grow at very high
pressure up to 1,000 atm, 110 MaP, and 15,000 psi
- Usually are also psychrophiles because the average temperature
at the ocean floor is 2C.
Barotolerant -
correct answer ✅Organisms that grow well over the range of 1-50
MPa.
Osmolarity -
correct answer ✅Measure of solute molecules in a solution,
inversely related to available water.
What are aquaporins? -
correct answer ✅- Membrane channel proteins that facilitate rapid
water transport across the membrane after than diffusion
