EXAM 2: MCB 2610 Exam 2|181 Questions with
Complete Solutions
Macronutrients CORRECT ANS-carbon, nitrogen, phosphorus, sulfur, oxygen, hydrogen,
potassium, sodium, magnesium, calcium, and iron
Micronutrients CORRECT ANS-manganese, zinc, cobalt, molybdenum, nickel, copper
All organisms require CORRECT ANS-Carbon, Hydrogen, Oxygen, and electrons
Autotrophs CORRECT ANS-Assimilate carbon from inorganic sources
Heterotrophs CORRECT ANS-Assimilate carbon in preexisting organic form
Phototrophs CORRECT ANS-Capture light energy to produce ATP
Chemotrophs CORRECT ANS-Capture energy from oxidation of reduced organic or
inorganic compounds
Organotrophs CORRECT ANS-Acquire their electrons from organic molecules
, EXAM 2: MCB 2610 Exam 2|181 Questions with
Complete Solutions
Lithotrophs CORRECT ANS-Acquire their electrons from inorganic sources
Mixotrophs CORRECT ANS-Some organisms have great metabolic flexibility and alter their
metabolism in response to environmental changes
Nitrogen CORRECT ANS-amino acids, purines, pyrimidines, some carbohydrates, lipids,
enzyme cofactors
- metabolism of amino acids, nitrates, ammonia
- nitrogen fixation
Phosphorus CORRECT ANS-nucleic acids, phospholipids, coenzymes, some proteins
- inorganic phosphate
- organic molecules containing a phosphoric group
Sulfur CORRECT ANS-amino acids, coenzymes
- amino acids cysteine and methonine
, EXAM 2: MCB 2610 Exam 2|181 Questions with
Complete Solutions
- sulfate (assimilatory sulfate reduction)
Growth factors CORRECT ANS-organic compounds that cannot be synthesized by an
organism but are essential for growth
- amino acids
- purines/pyrmidines
- vitamins
Nutrient Concentration CORRECT ANS-Growth rate depends on amount of nutrients in the
environment
Aerobes CORRECT ANS-Grow in the presence of oxygen
Obligate aerobes CORRECT ANS-Require oxygen
Microaerophiles CORRECT ANS-Grow best when there is less oxygen than normal
, EXAM 2: MCB 2610 Exam 2|181 Questions with
Complete Solutions
Anaerobic CORRECT ANS-Growth occurs without oxygen
Aerotolerant anaerobes CORRECT ANS-Aren't harmed by oxygen, but don't use it either.
Obligate anaerobes CORRECT ANS-Cannot grow when oxygen is present
Facultative anaerobes CORRECT ANS-Can use oxygen but can also grow in the absence of
oxygen
Reactive Oxygen Species CORRECT ANS-Reduced from oxygen
Strict anaerobic microbes CORRECT ANS-Lack superoxide dismutase and catalase
(protective enzymes)
Anaerobic workstation CORRECT ANS-Incubator, work gloves, airlock
Complete Solutions
Macronutrients CORRECT ANS-carbon, nitrogen, phosphorus, sulfur, oxygen, hydrogen,
potassium, sodium, magnesium, calcium, and iron
Micronutrients CORRECT ANS-manganese, zinc, cobalt, molybdenum, nickel, copper
All organisms require CORRECT ANS-Carbon, Hydrogen, Oxygen, and electrons
Autotrophs CORRECT ANS-Assimilate carbon from inorganic sources
Heterotrophs CORRECT ANS-Assimilate carbon in preexisting organic form
Phototrophs CORRECT ANS-Capture light energy to produce ATP
Chemotrophs CORRECT ANS-Capture energy from oxidation of reduced organic or
inorganic compounds
Organotrophs CORRECT ANS-Acquire their electrons from organic molecules
, EXAM 2: MCB 2610 Exam 2|181 Questions with
Complete Solutions
Lithotrophs CORRECT ANS-Acquire their electrons from inorganic sources
Mixotrophs CORRECT ANS-Some organisms have great metabolic flexibility and alter their
metabolism in response to environmental changes
Nitrogen CORRECT ANS-amino acids, purines, pyrimidines, some carbohydrates, lipids,
enzyme cofactors
- metabolism of amino acids, nitrates, ammonia
- nitrogen fixation
Phosphorus CORRECT ANS-nucleic acids, phospholipids, coenzymes, some proteins
- inorganic phosphate
- organic molecules containing a phosphoric group
Sulfur CORRECT ANS-amino acids, coenzymes
- amino acids cysteine and methonine
, EXAM 2: MCB 2610 Exam 2|181 Questions with
Complete Solutions
- sulfate (assimilatory sulfate reduction)
Growth factors CORRECT ANS-organic compounds that cannot be synthesized by an
organism but are essential for growth
- amino acids
- purines/pyrmidines
- vitamins
Nutrient Concentration CORRECT ANS-Growth rate depends on amount of nutrients in the
environment
Aerobes CORRECT ANS-Grow in the presence of oxygen
Obligate aerobes CORRECT ANS-Require oxygen
Microaerophiles CORRECT ANS-Grow best when there is less oxygen than normal
, EXAM 2: MCB 2610 Exam 2|181 Questions with
Complete Solutions
Anaerobic CORRECT ANS-Growth occurs without oxygen
Aerotolerant anaerobes CORRECT ANS-Aren't harmed by oxygen, but don't use it either.
Obligate anaerobes CORRECT ANS-Cannot grow when oxygen is present
Facultative anaerobes CORRECT ANS-Can use oxygen but can also grow in the absence of
oxygen
Reactive Oxygen Species CORRECT ANS-Reduced from oxygen
Strict anaerobic microbes CORRECT ANS-Lack superoxide dismutase and catalase
(protective enzymes)
Anaerobic workstation CORRECT ANS-Incubator, work gloves, airlock
