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STRAIGHTERLINE MICROBIOLOGY EXAM QUESTIONS AND ANSWERS 2024/2025( A+ GRADED 100% VERIFIED).
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STRAIGHTERLINE MICROBIOLOGY EXAM QUESTIONS AND ANSWERS 2024/2025( A+ GRADED 100% VERIFIED).
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STRAIGHTERLINE MICROBIOLOGYCell walls are not typically possessed by ______. - ANS protozoa
The two major groups of helminths are the ______ and the ______. - ANS roundworms;
flatworms
Which of the following is not true of conjugation?
a. Involves direct contact between cells
b. Transfers genes for drug resistance
c. Transfers genes for enzymes and adherence molecules
d. Involves the action of bacteriophage
e. The donor retains a copy of the transferred genes - ANS Involves the action of
bacteriophage
Which of the following properties is likely to be found in a pioneer colonizer of a biofilm on an
artificial joint implant? - ANS Surface structures for attaching to tissue
A bacterium is inoculated into a tube of thioglycollate and incubated. After incubation, turbidity
appears throughout, top to bottom, with the greatest turbidity at the very top. This bacterium
would be called a(n) ______. - ANS facultative anaerobe
An organic nutrient that cannot be synthesized by the organism and must be provided is called
a(n) ______. - ANS growth factor
Humans can see objects as small as 0.1 mm. Leeuwenhoek's best microscope could magnify
objects to 300X. Which of the following would be invisible using Leeuwenhoek's microscope? -
ANS Poliovirus, 30 nm
Which of the following is not associated with every virus?
a. Envelope
b. Capsomeres
c. Capsid
d. Nucleic acid
e. Genome - ANS Envelope
A diagram of the three domains (Bacteria, Archaea, Eukarya) proceeding from the Last
Universal Common Ancestor would show Archaea - ANS branching off the Domain Eukarya.
During aerobic cellular respiration, the final electron acceptor is ______. - ANS oxygen
, The endosymbiotic theory has been developed to explain the emergence of ______. - ANS
eukaryotes
Which of the following is a unique characteristic of viruses that distinguishes them from the
other major groups of microorganisms?
a. Cause human disease
b. Lack a nucleus
c. Cannot be seen without a microscope
d. Contain genetic material
e. Lack cell structure - ANS Lack cell structure
What type of mutation alters the base but not the amino acid being coded for? - ANS Silent
The eukaryotic cell organelle that most resembles a bacterial cell is the ______. - ANS
mitochondrion
Koch's postulates are criteria used to establish that - ANS specific microbe is the cause of a
specific disease
The study of evolutionary relationships among organisms is called ______. - ANS phylogeny
Starch is the primary storage food for all of the following except ______. - ANS animals
What is the maximum number of electrons in the second energy shell of an atom? - ANS 8
A nutrient medium that has all of its chemical components identified and their precise
concentrations known and reproducible is termed ______. - ANS defined
The correct microbiological term for the sample of specimen that is put into a nutrient medium to
produce a culture is ______. - ANS inoculum
The bacterium Neisseria gonorrhoeae causes the sexually-transmitted infection gonorrhea.
Although it can be isolated from the vagina, there are numerous normal biota in that location as
well. To generate a pure culture of this pathogenic bacterium, the best choice is a(n) ______. -
ANS selective medium
A fat is called _____ if all carbons of the fatty acid chain are single-bonded to 2 other carbons
and 2 hydrogens. - ANS saturated
Caring for patients infected with a new virus requires safety precautions for medical personnel.
Choosing appropriate procedures is an example of a(n) ______ process. - ANS deductive
All of the following are diameters of cells that would be resolved in a microscope with a limit of
resolution of 0.2 µm except ______. - ANS 0.1 µm
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