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Flashcards in Bacteriology Exam 1 Material Deck (139)
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1

Strains within a species with distinctive antigenic properties are known as ___________

serovars

Ex: Leptospira interrogans serovar Pomona 

2

T/F: Capsule, flagella, and pili are present in all bacteria

False

3

What is the site of translation in a bacterial cell?

ribosomes

4

The genetic material of the bacterial cell is called the:

chromosome

5

Flagella are composed of a protein called _________

flagellin

6

What type of flagella are present in the image?

Peritrichous flagellum

7

What type of flagella are present in the image?

Amphitrichous flagellum

8

Woah, nice flagella!

What type of flagella are present in the image?

Lophotrichous flagellum

9

What type of flagella are present in the image?

Monotrichous flagellum

10

__________ are short, hair-like structures on the surfaces of prokaryotic cells

Fimbriae, or pili

11

Fimbriae are very common in Gram-_________ bacteria 

Fimbriae are very common in Gram-negative bacteria

Fimbriae are most often involved in adherence of bacteria to surfaces, substrates and other cells or tissues in nature. 

12

The Gram-__________ cell wall is mainly composed of peptidoglycan

The Gram-positive cell wall is mainly composed of peptidoglycan

13

The capsule of Bacilllus anthracis is composed of:

poly-D-glutamate

this is one of the principal virulence factors during anthrax infection

14

Bacterial murein is a unique type of ____________

Peptidoglycan

15

Which feature distinguishes bacteria from archaea?

The cell walls of archaea do not contain murein!!!

16

The cells walls of archaea do not contain _________. This feature distinguishes archaea from bacteria.

murein

17

The Gram-positive cell wall contains a unique group of molecules called __________ acids

teichoic acids

18

The outer membrane of Gram-negative bacteria invariably contains ____________, which is toxic to animals

Lipopolysaccharide

(LPS or endotoxin)

19

The toxic component of endotoxin (LPS) is:

Lipid A

20

Most bacteria reproduce by:

binary fission

(each cell increases in size and divides into two cells)

21

the length of time required for a single bacterial cell to yield two daughter cells is called the:

generation time

22

involution forms of bacteria can be seen during which stage of bacterial growth?

Decline phase

23

Most bacteria use organic chemicals as sources of energy and carbon, and are therefore known as: 

chemoheterotrophs

24

Name the growth factors that are required for synthesis of nucleic acids

Purines and pyrimidines

25

Name the growth factor(s) that is/are required for synthesis of proteins

Amino acids

26

Organisms with an optimum growth temperature near 37°C are called:

mesophiles

27

Organisms with an optimum growth temperature between about 45°C and 70°C are called:

thermophiles

28

Microorganisms which grow at an optimum pH well below neutrality (7.0) are called:

acidophiles

29

Microorganisms that grow best under alkaline conditions are called:

alkaliphiles

30

T/F: Bacteria require water for growth

TRUE