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Unit Exam Quiz

21 Questions - Developed by: - Developed on: 2017-05-03 - 3,181 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
Fungi
Protozoa

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?

All organisms are unicellular, made up of one cell.
Replication requires the division of cells into two equal cells.
Cells are fundamental units of life.
Hereditary information is passed on in the form of DNA.

3

All of the following are considered microbes except:

Viruses
Worms
Bacteria
Protozoa

4

A microorganism that causes disease is _______ .

Algae
Virulent
Phagocytic
Pathogenic

5

Microbiology is the study of bacteria, algae, fungi, viruses and protozoa. Most of these are single-celled, except for which two:

Algae and fungi (some have many cells)
Bacteria and viruses
Bacteria (some of which are multicellular) and algae
Protozoa and fungi

6

All of the following statements agree with the germ theory of disease, except:

Microorganisms can invade other organisms and cause disease
Maggots only grow on meat that is left in an open flask because microbes are transmitted by flies and do not spontaneously generate
Disease is not caused by bad air or spirits
Disease causing organisms will spontaneously arise from decaying meat

7

Koch’s postulates were:

Specific to anthrax and tuberculosis but don’t apply to other diseases.
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.

8

Which statement about variolation is false?

Variolation used chemicals produced from another microorganism to immunize against the disease causing microbe.
Variolation leads to a controlled infection that induces immunity against further infection.
Variolation originated in ancient China.
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 had small compact structures that allowed for the production of metabolites and replication.
They are capable of capturing energy from the sun.
They borrowed the use of existing metabolic and replicative mechanisms of the host cells they infected.

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.
A good hypothesis is one that offers the simplest most reasonable explanation and can be tested.
A prediction is the factor that can change but is prevented from changing during the duration of the experiment.
The goal of an experiment is to prove that scientists are always correct in their predictions.

11

Bacteriophages are:

Used to introduce genes in gene therapy
Modified antibiotics that were used in the Soviet Union
Viruses that attack and kill specific kinds of bacteria including antibiotic resistant bacteria
Some of the genes in the human genome

12

The concept of putting microbes to work to clean up the environment is called:

Immunization
Bioremediation
Fermentation
Pasteurization

13

Which of the following is not true of algae?

They have a nucleus
They photosynthesize to produce their own food
They are found in both fresh- and salt-water
They never cause disease in humans

14

The first person to use a microscope to observe cells invisible to the naked eye was:

Anton van Leeuwenhoek
Louis Pasteur
Matthias Schleiden
Robert Hooke

15

From the following choices, who is not known primarily for their work with antibiotics?

Gerhard Domagk
Alexander Fleming
Selman Waksman
Gregor Mendel

16

The field of ___________ involves studying how a person defends him/ herself against microbial infection.

Virology
Molecular biology
Immunology
Mycology

17

The period from 1874 to 1917 is generally referred to as the _______ because __________.

Age of molecular genetics; important discoveries were made about molecular processes
Age of microbial appreciation; many people were excited about viruses
Golden age of seminal discovery; research on viruses was fruitful
Golden age of microbiology; microbiology was at the forefront of biomedical research in medicine and biology

18

When sodium hydroxide, a strong base, is added to water, the pH of the solution _____.

Remains the same
Goes up
Goes down
Cannot be determined

19

An ion is all of the following except:

An atom that has lost or gained one or more electrons
An atom with the same number of protons as electrons
Either a cation or an anion
A charge atom

20

Disaccharides, such as sucrose and lactose, are formed from:

Long chain of carbon atoms and a carboxyl group at one end of chain.
Chains of two amino acids.
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?

1-4
6-9
5

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