Microorganism Qiuz 1
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Microorganisms – or microbes – are microscopic organisms that can exist in their single-celled form, or in a colony of cells. They are organisms that cannot be seen with the naked eye, but with a microscope, hence the name.
- 1.Disease-causing microorganisms are called
- A.
Decomposers
- B.
Procaryotes
- C.
Pathogens
- D.
Eucaryotes
- E.
Fermenters
- 2.The microorganisms that recycle nutrients by breaking down dead matter and wastes are called
- A.
Decomposers
- B.
Prokaryotes
- C.
Pathogens
- D.
Eukaryotes
- E.
Fermenters
- 3.The microorganisms that do not have a nucleus in their cells are called
- A.
Decomposers
- B.
Prokaryotes
- C.
Pathogens
- D.
Eukaryotes
- E.
Fermenters
- 4.All microorganisms are best defined as organisms that
- A.
Cause human disease
- B.
Lack a cell nucleus
- C.
Are infectious particles
- D.
Are too small to be seen with the unaided eye
- E.
Can only be found growing in laboratories
- 5.Which of the following is a unique characteristic of viruses that distinguishes them from the other major group of microorganism?
- A.
Cause human disease
- B.
Lack a nucleus
- C.
Cannot be seen without a microscope
- D.
Contain genetic material
- E.
Lack cell structure
- 6.Koch's postulates are criteria used to establish that
- A.
Microbes are found on dust particles
- B.
A specific microbe is the cause of a specific disease
- C.
Life forms can only arise from preexisting life forms
- D.
A specific microbe should be classified in a specific kingdom
- E.
Microbes can be used to clean up toxic spills
- 7.Which of the following is a proper scientific name?
- A.
Streptoccoci pyogenes
- B.
Bacillus subtilis
- C.
B. subtilis
- D.
Bacillus subtilis
- E.
Streptocci
- 8.The study of evolutionary relationships among organisms is called
- A.
Biotechnology
- B.
Genetics
- C.
Recombinant DNA
- D.
Phylogeny
- E.
Taxonomy
- 9.The surgeon who advocated using disinfectants on hands and in the air prior to surgery was
- A.
Joseph Lister
- B.
Ignaz Semmelweis
- C.
Robert Koch
- D.
Louis Pasteur
- E.
Antonis van leewenhoek
- 10.The term sterile means free of all life forms
- A.
True
- B.
False
- 11.Select the correct descending taxonomic hierarchy(left to right)
- A.
Family, order, class
- B.
Family, genus, species
- C.
Genus, species, family
- D.
Class, phylum, order
- E.
Kingdom, domain, phylum
- 12.A friend has told you that he thinks that the world would be a safer place if all bacteria could be destroyed. Which of the following would be true if his suggestion were carries out?
- A.
There would be no infectious diseases in humans
- B.
Pets would be free of disease
- C.
Certain foods such as beer, cheese, or yogurt could not be made easily
- D.
There would be no ability to make medicines
- 13.Anything that occupies space and has mass is called
- A.
An electron
- B.
Living
- C.
Matter
- D.
Energy
- E.
Space
- 14.The subatomic particles that surround the nucleus are the
- A.
Electrons
- B.
Protons
- C.
Neutrons
- D.
Protons and neutrons
- E.
Protons and electrons
- 15.Cations are
- A.
Charged subatomic particles
- B.
Atoms that have gained electrons
- C.
Radioactive isotopes
- D.
Capable of forming ionic bonds with anions
- E.
Atoms without protons
- 16.The prominent building blocks of an enzyme are
- A.
Nucleotides
- B.
Glycerol and fatty acids
- C.
Monosaccharides
- D.
Phosphate, glycerol, fatty acids
- E.
Amino acids
- 17.The polynucleotides strands of DNA are linked along their length by___________ bonds between the bases
- A.
Covalent
- B.
Ionic
- C.
Van der Waals
- D.
Double
- E.
Hydrogen
- 18.The type of chemical bond linking amino acids together is a(n)
- A.
Glycosidic bond
- B.
Peptide bond
- C.
Ester bond
- D.
Ionic bond
- E.
Hydrogen bond
- 19.Which of the following is the stored form of carbohydrates in animals?
- A.
Glycogen
- B.
Maltose
- C.
Starch
- D.
Cellulose
- E.
Galactose
- 20.The o< helix and B-pleated sheet are examples of
- A.
Primary structure
- B.
Secondary structure
- C.
Tertiary structure
- D.
Quaternary structure
- E.
Gamma structures
- 21.The five I's of studying microorganisms include all of the following except
- A.
Inoculation
- B.
Incubation
- C.
Infection
- D.
Isolation
- E.
Identification
- 22.The term that refers to the purposeful assition of micoorganisms into a laboratory nutrient medium is
- A.
Isolation
- B.
Inoculation
- C.
Immunization
- D.
Infection
- E.
Contamination
- 23.Which of the following is essential for development of discrete, isolated colonies?
- A.
Broth medium
- B.
Differential medium
- C.
Selective medium
- D.
Solid medium
- E.
Assay medium
- 24.A pure culture contains only
- A.
One species of microorganism
- B.
Bacteria
- C.
A variety of microbes from one source
- D.
A variety of species from the same genus
- E.
None of the choices are correct
- 25.A microbiologist inoculates Staphylococcus aureus into a culture medium. Following incubation both Staphylococcus aureus and Staphylococcus epidermidis are determined to be growing in the culture. what is the most likely explanation?
- A.
The microbiologist used too much inoculum
- B.
The culture is contaminated
- C.
The incubation temperature was incorrect
- D.
The culture medium must be selective
- E.
The culture medium must be differential
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