Microbiology BIO 420 Exam 1 Questions
and Answers
Question 1
This physical method of destroying microbes oxidizes cell to ashes are used to
destroy medical waste and animal carcasses
Correct Answer
Dry heat
Page 1 of 59
,Question 2
The Cytoplasmic Membrane Lipid Bilayer
Correct Answer
Pass through easily:
Gases (O2, CO2, N2)
Small hydrophobic
molecules
Passes through:
Water
Do not pass through:
Sugars
Ions
Amino acids
ATP
Macromolecules
(a) The cytoplasmic membrane is selectively permeable. Gases, small hydrophobic
molecules, and water are the only substances that
pass freely through the phospholipid bilayer.
(b) Aquaporins allow water to pass through the cytoplasmic membrane
more easily.
Page 2 of 59
,Question 3
How is NAD+ regenerated?
Correct Answer
Fermentation
Cellular Respiration
Question 4
lipopolysaccharide (LPS) is clinically significant
Correct Answer
signals immune system of invasion by Gram-negative bacteria
Large amounts accumulating in bloodstream can yield deadly response
Question 5
Stationary phase
Correct Answer
Overall population remains relatively stable. Cells exhaust the nutrients, dying cells
supply the metabolites for living cells.
Question 6
Combine with sulfhydryl groups of enzymes, proteins
High concentrations too toxic to be used medically
Correct Answer
Metal Compounds
Question 7
All living things can be classified into one of three groups, or
Correct Answer
domains:
Bacteria
Archaea
Eukarya
Page 3 of 59
, Question 8
Biogenesis states that___
Correct Answer
All living forms arose from preexisting living forms
Question 9
___chambers are ideal for anaerobic incubation
Correct Answer
Anaerobic
Question 10
ATP
Correct Answer
The molecule is composed of ribose, adenine, and three phosphate groups
arranged in a row
Question 11
Preservation
Correct Answer
process of delaying spoilage of foods and other perishable products
Page 4 of 59
and Answers
Question 1
This physical method of destroying microbes oxidizes cell to ashes are used to
destroy medical waste and animal carcasses
Correct Answer
Dry heat
Page 1 of 59
,Question 2
The Cytoplasmic Membrane Lipid Bilayer
Correct Answer
Pass through easily:
Gases (O2, CO2, N2)
Small hydrophobic
molecules
Passes through:
Water
Do not pass through:
Sugars
Ions
Amino acids
ATP
Macromolecules
(a) The cytoplasmic membrane is selectively permeable. Gases, small hydrophobic
molecules, and water are the only substances that
pass freely through the phospholipid bilayer.
(b) Aquaporins allow water to pass through the cytoplasmic membrane
more easily.
Page 2 of 59
,Question 3
How is NAD+ regenerated?
Correct Answer
Fermentation
Cellular Respiration
Question 4
lipopolysaccharide (LPS) is clinically significant
Correct Answer
signals immune system of invasion by Gram-negative bacteria
Large amounts accumulating in bloodstream can yield deadly response
Question 5
Stationary phase
Correct Answer
Overall population remains relatively stable. Cells exhaust the nutrients, dying cells
supply the metabolites for living cells.
Question 6
Combine with sulfhydryl groups of enzymes, proteins
High concentrations too toxic to be used medically
Correct Answer
Metal Compounds
Question 7
All living things can be classified into one of three groups, or
Correct Answer
domains:
Bacteria
Archaea
Eukarya
Page 3 of 59
, Question 8
Biogenesis states that___
Correct Answer
All living forms arose from preexisting living forms
Question 9
___chambers are ideal for anaerobic incubation
Correct Answer
Anaerobic
Question 10
ATP
Correct Answer
The molecule is composed of ribose, adenine, and three phosphate groups
arranged in a row
Question 11
Preservation
Correct Answer
process of delaying spoilage of foods and other perishable products
Page 4 of 59
