Unit Exam Quiz

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21 Questions - Developed by: Alicia Love - Developed on: - 650 taken

  • 1
    A parasitologist studies parasites. What does a mycologist study?
    How viruses cause disease and are involved in cancer
    The development of chemical substances to treat diseases
  • 2
    The English scientist Robert Hooke coined the term cell because the small boxes he saw in the microscope reminded him of a monk’s room. What is the cell theory that was later proposed?
    Cells are fundamental units of life.
    Hereditary information is passed on in the form of DNA.
    Replication requires the division of cells into two equal cells.
    All organisms are unicellular, made up of one cell.
  • 3
    All of the following are considered microbes except:
  • 4
    A microorganism that causes disease is _______ .
  • 5
    Microbiology is the study of bacteria, algae, fungi, viruses and protozoa. Most of these are single-celled, except for which two:
    Bacteria (some of which are multicellular) and algae
    Algae and fungi (some have many cells)
    Bacteria and viruses
    Protozoa and fungi
  • 6
    All of the following statements agree with the germ theory of disease, except:
    Maggots only grow on meat that is left in an open flask because microbes are transmitted by flies and do not spontaneously generate
    Microorganisms can invade other organisms and cause disease
    Disease is not caused by bad air or spirits
    Disease causing organisms will spontaneously arise from decaying meat
  • 7
    Koch’s postulates were:
    Interpreted as many organism could cause the same disease.
    Strict in that microorganisms isolated from experimentally inoculated hosts had to be different from the microorganism that was introduced into the host.
    Designed to establish a casual relationship between a causative microbe and a disease.
    Specific to anthrax and tuberculosis but don’t apply to other diseases.
  • 8
    Which statement about variolation is false?
    Variolation originated in ancient China.
    Variolation leads to a controlled infection that induces immunity against further infection.
    Variolation used chemicals produced from another microorganism to immunize against the disease causing microbe.
    Variolation involves infecting a person with dried scabs from lesions of people who had recovered from the disease.
  • 9
    Viruses were initially identified as small infectious agents that could pass through filters. How was it believed that these agents could survive?
    They survived on the metabolites and poisons that pass through the filter.
    They borrowed the use of existing metabolic and replicative mechanisms of the host cells they infected.
    They are capable of capturing energy from the sun.
    They had small compact structures that allowed for the production of metabolites and replication.
  • 10
    Microbiologists investigate problems by designing and carrying out experiments. What is true about the scientific method?
    A hypothesis is the definitive explanation to account for the observation and therefore does not need to be tested.
    The goal of an experiment is to prove that scientists are always correct in their predictions.
    A prediction is the factor that can change but is prevented from changing during the duration of the experiment.
    A good hypothesis is one that offers the simplest most reasonable explanation and can be tested.
  • 11
    Bacteriophages are:
    Modified antibiotics that were used in the Soviet Union
    Viruses that attack and kill specific kinds of bacteria including antibiotic resistant bacteria
    Used to introduce genes in gene therapy
    Some of the genes in the human genome
  • 12
    The concept of putting microbes to work to clean up the environment is called:
  • 13
    Which of the following is not true of algae?
    They are found in both fresh- and salt-water
    They photosynthesize to produce their own food
    They never cause disease in humans
    They have a nucleus
  • 14
    The first person to use a microscope to observe cells invisible to the naked eye was:
    Anton van Leeuwenhoek
    Matthias Schleiden
    Robert Hooke
    Louis Pasteur
  • 15
    From the following choices, who is not known primarily for their work with antibiotics?
    Gregor Mendel
    Gerhard Domagk
    Alexander Fleming
    Selman Waksman
  • 16
    The field of ___________ involves studying how a person defends him/ herself against microbial infection.
    Molecular biology
  • 17
    The period from 1874 to 1917 is generally referred to as the _______ because __________.
    Golden age of microbiology; microbiology was at the forefront of biomedical research in medicine and biology
    Age of microbial appreciation; many people were excited about viruses
    Golden age of seminal discovery; research on viruses was fruitful
    Age of molecular genetics; important discoveries were made about molecular processes
  • 18
    When sodium hydroxide, a strong base, is added to water, the pH of the solution _____.
    Cannot be determined
    Goes down
    Remains the same
    Goes up
  • 19
    An ion is all of the following except:
    Either a cation or an anion
    A charge atom
    An atom with the same number of protons as electrons
    An atom that has lost or gained one or more electrons
  • 20
    Disaccharides, such as sucrose and lactose, are formed from:
    Chains of two amino acids.
    Long chain of carbon atoms and a carboxyl group at one end of chain.
    Two monosaccharides connected by a glycosidic bond.
    Three fatty acids combined with glycerol.
  • 21
    Which of the following pH values would indicate the weakest acid?

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