BIO 250 STRAIGHTERLINE
MICROBIOLOGY FINAL PAPER 2026
TEST PAPER QUESTIONS AND
SOLUTIONS COMPLETE BUNDLE
GRADED A+
◉ In the nitrogen cycle, which of the following phases involves the
release of nitrogen as N2? Answer: Denitrification
◉ In the secondary phase of wastewater treatment, why is air injected
into the sludge as it is stirred and recirculated? Answer: The
bioremediators need oxygen
◉ Which of the following microorganisms is used to make yogurt?
Answer: Lactobacillus bulgaricus
◉ ATP is a Answer: Nucleotide that releases and stores energy in the
cell
◉ A viral capsid is composed of Answer: proteins
◉ which of these are NOT considered a living organism? Answer:
Viruses
, ◉ which of the following describes the order in which different types of
RNA are involved in translation? Answer: Messenger RNA (mRNA),
transfer RNA (tRNA), Ribosomal RNA (rRNA)
◉ what is the bacterial identification technique that, when positive,
results in the bacterium staining two contrasting colors? Answer: Gram
staining
◉ Which of the following is found In some, but not all groups of
eukaryotic microorganisms? Answer: cell wall
◉ In which instance would a researcher need to use Bergey's manual of
systemic bacteriology instead of Bergey's manual of determinative
bacteriology? Answer: to investigate genetic history of bacterial species
◉ which of the following structures is found in gram-negative bacteria
but is absent from gram-positive bacteria? Answer: outer lipid
membrane
◉ which type of archaea is able to survive in extremely high
concentrations of salt? Answer: halophiles
◉ which of the following is true of prokaryotes, but not true of
eukaryotes? Answer: they have cell walls made of peptidoglycan
MICROBIOLOGY FINAL PAPER 2026
TEST PAPER QUESTIONS AND
SOLUTIONS COMPLETE BUNDLE
GRADED A+
◉ In the nitrogen cycle, which of the following phases involves the
release of nitrogen as N2? Answer: Denitrification
◉ In the secondary phase of wastewater treatment, why is air injected
into the sludge as it is stirred and recirculated? Answer: The
bioremediators need oxygen
◉ Which of the following microorganisms is used to make yogurt?
Answer: Lactobacillus bulgaricus
◉ ATP is a Answer: Nucleotide that releases and stores energy in the
cell
◉ A viral capsid is composed of Answer: proteins
◉ which of these are NOT considered a living organism? Answer:
Viruses
, ◉ which of the following describes the order in which different types of
RNA are involved in translation? Answer: Messenger RNA (mRNA),
transfer RNA (tRNA), Ribosomal RNA (rRNA)
◉ what is the bacterial identification technique that, when positive,
results in the bacterium staining two contrasting colors? Answer: Gram
staining
◉ Which of the following is found In some, but not all groups of
eukaryotic microorganisms? Answer: cell wall
◉ In which instance would a researcher need to use Bergey's manual of
systemic bacteriology instead of Bergey's manual of determinative
bacteriology? Answer: to investigate genetic history of bacterial species
◉ which of the following structures is found in gram-negative bacteria
but is absent from gram-positive bacteria? Answer: outer lipid
membrane
◉ which type of archaea is able to survive in extremely high
concentrations of salt? Answer: halophiles
◉ which of the following is true of prokaryotes, but not true of
eukaryotes? Answer: they have cell walls made of peptidoglycan
