Microbiology Exam 1 Multiple Choice Questions

Front 1

The microbes commonly known as _____ are single celled eurkaryotes that are generally motile

Back 1

Protozoa

Front 2

Carl Woese proposed the concept of the domain based on differences in which of the following cellular molecules?

Back 2

Ribosomal RNA

Front 3

In microbiology, the term growth usually refers to an increase in

Back 3

The number of microbial cells

Front 4

Which of the following scientists provided evidence in favor of the concept of spontaneous generation

Back 4

Needham

Front 5

Which of the following is not a characteristic of viruses?

Back 5

They are visible with a light microscope.

Front 6

Which of the following is not a direct method for measuring the number of microbes in a sample?

Back 6

Turbidity

Front 7

Which of the following scientists was the first to develop a taxonomic system for classifying organisms?

Back 7

Carl Linneaus

Front 8

The study of the occurence, distribution, and spread of disease is known as.

Back 8

Epidemiology

Front 9

Which of the following bacterial cell structures plays an important role in the creation of biofilms?

Back 9

Fimbrae and glycocalyces

Front 10

The gram stain works because of the differences of _____ in bacteria.

Back 10

Cell walls

Front 11

Which of the following is not a component of bacterial cell walls?

Back 11

Tubulin

Front 12

Which of the following statements concerning Koch's postulates is false?

Back 12

A suspected pathogen must be found in the majority of individuals with the disease.

Front 13

Fermentation pathways provide a cell with alternative ways to regnerate NAD+ with glycolosis

Back 13

True

Front 14

Which of the following have external structures containing a periplasmic space?

Back 14

Gram-negative

Front 15

The ability of a lense to gather light.

Back 15

Numerical aperture

Front 16

Chemical reactions that can proceed toward anabolism or catabolism are called

Back 16

Amphibolic

Front 17

Nitrogen is a growth limiting nutrient for many organisms because

Back 17

Only a few microbes can extract it from the atmosphere, but all organisms require it for amino acid and nucleotide synthesis.

Front 18

Which of the following is not a characteristic of a genus name?

Back 18

It is usually an adjective.

Front 19

Which of the following is not an observation Pasteur made concerning the fermentation of grape juice?

Back 19

Pasteurization kills yeast to prevent spoilage of grape juice.

Front 20

Which of the following is unique to Archae?

Back 20

Hami

Front 21

The term blank literally means ______ producing disease.

Back 21

Pathogen

Front 22

A colony forming unit is the number of cells

Back 22

That produces one colony.

Front 23

A student is looking at a bacterial specimen using the oil-immersion lens but has forgotten to put the immersion oil on the slide. The specimen will appear:

Back 23

Somewhat fuzzy and have poor resolution.

Front 24

Bacteria of the genus mycoplasm are distinguished from other bacterial cells by

Back 24

Absence of a cell wall

Front 25

In microscopy, the term resolution refers to

Back 25

The ability to distinguish, find structure in detail in a specimen.

Front 26

Anabolic reactions may be characterized as

Back 26

Breaking large molecules into smaller molecules.

Front 27

Which of the following individuals pioneered the use of chemicals to reduce the incidence of infections during surgery?

Back 27

Lister

Front 28

Which of the following can be the final electron receptor in anaerobic respiration in bacteria?

Back 28

Both nitrate and sulfate.

Front 29

NAD+ and NADP+ are important examples of both coenzymes and electron carriers.

Back 29

True

Front 30

Which organism is not correctly matched to it's energy source?

Back 30

Photoautotroph - CO2

Front 31

What is the fate of piruvic acid in an organism that uses aerobic respiration?

Back 31

Oxidized in the Kreb's Cycle

Front 32

If a microbiology lab technichian left the safranin out of a Gram-staining procedure, what would happen?

Back 32

Gram-positive would appear purple, gram-negative would be colorless.

Front 33

A bacterial cell moving toward light would be an example of

Back 33

Positive phototaxis

Front 34

Which of the following was not an aspect of Pasteur's experiment to disprove spontaneous generation?

Back 34

The flasks he used were sealed with corks.

Front 35

Bacterial cells are usually a few ____ in size.

Back 35

Micrometers

Front 36

MacConkey agar plates represent ______ medium.

Back 36

Differential and selective.

Front 37

Assume you are working for a chemical company and are responsible for growing a yeast culture that produces ethanol. The yeast are growing well on the multose medium but are not producing alcohol. What is the most likely explanation?

Back 37

Oxygen is in the medium.

Front 38

Which of the following is the best definition of fermentation?

Back 38

The partial oxidation of glucose with organic molecules serving as electron receptors.