MCB4403 Quiz 2 FSU questions with
verified answers rated A+
Water activity - correct answer ✔✔a measure of how much water in a solution is
available for a microbe to use
Osmolarity - correct answer ✔✔a measure of the number of solute molecules in a
solution and is inversely related to water activity
aquaporins - correct answer ✔✔membrane channel proteins that allow water to
move quickly across membranes to equalize internal and external pressures
compatible solutes - correct answer ✔✔used to minimize pressure differences
across the cell membrane
mechanosensitive channels - correct answer ✔✔can leak solutes out of the cell
when internal pressure rises
halophilic organisms - correct answer ✔✔grow best at high salt concentrations
5-8 - correct answer ✔✔what pH do neutralophiles grow in?
0-5 - correct answer ✔✔what pH do acidophiles grow in?
, 9-11 - correct answer ✔✔what pH do alkalophiles grow in?
0-20 C - correct answer ✔✔what temp do psychrophiles grow in?
12-45 C - correct answer ✔✔what temp do mesophiles grow in?
40-80 C - correct answer ✔✔what temp do thermophiles grow in?
65-113 C - correct answer ✔✔what temp do extremophiles grow in?
heterotroph - correct answer ✔✔an organism that is dependent on complex
organic substances for nutrients
autotroph - correct answer ✔✔an organism that is able to form nutritional
organic substances from simple inorganic substances
phototrophy - correct answer ✔✔organisms that capture photons to aquire
energy
chemotroph - correct answer ✔✔organisms that obtain energy by the oxidation
of electron donors in their environments (can be organic or inorganic)
Carbon, Nitrogen, Phosphorus, Hydrogen, Oxygen, Sulfur (PHONCS) - correct
answer ✔✔What macronutrients do microbes need to stay alive (carbs lipids
nucleic acids and proteins)?
verified answers rated A+
Water activity - correct answer ✔✔a measure of how much water in a solution is
available for a microbe to use
Osmolarity - correct answer ✔✔a measure of the number of solute molecules in a
solution and is inversely related to water activity
aquaporins - correct answer ✔✔membrane channel proteins that allow water to
move quickly across membranes to equalize internal and external pressures
compatible solutes - correct answer ✔✔used to minimize pressure differences
across the cell membrane
mechanosensitive channels - correct answer ✔✔can leak solutes out of the cell
when internal pressure rises
halophilic organisms - correct answer ✔✔grow best at high salt concentrations
5-8 - correct answer ✔✔what pH do neutralophiles grow in?
0-5 - correct answer ✔✔what pH do acidophiles grow in?
, 9-11 - correct answer ✔✔what pH do alkalophiles grow in?
0-20 C - correct answer ✔✔what temp do psychrophiles grow in?
12-45 C - correct answer ✔✔what temp do mesophiles grow in?
40-80 C - correct answer ✔✔what temp do thermophiles grow in?
65-113 C - correct answer ✔✔what temp do extremophiles grow in?
heterotroph - correct answer ✔✔an organism that is dependent on complex
organic substances for nutrients
autotroph - correct answer ✔✔an organism that is able to form nutritional
organic substances from simple inorganic substances
phototrophy - correct answer ✔✔organisms that capture photons to aquire
energy
chemotroph - correct answer ✔✔organisms that obtain energy by the oxidation
of electron donors in their environments (can be organic or inorganic)
Carbon, Nitrogen, Phosphorus, Hydrogen, Oxygen, Sulfur (PHONCS) - correct
answer ✔✔What macronutrients do microbes need to stay alive (carbs lipids
nucleic acids and proteins)?
