Microbiology - Test 1 - Daytona State College - Dr. Nayar

Front 1

Which of the following is not a type of microorganism studied in a Microbiology course?

a) bacteria
b) virus
c) protozoa
d) algae
e) helminths
f) fungi

Back 1

b) virus

Viruses are not considered microoriganisms

Front 2

What am I?

- Gram Negative (small rod)
- Coliform/Enteric Bacteria
- Greenish pigment
- causes UTI
- can form biofilm
- part of normal flora found on skin
- Monotrichous

Back 2

Pseudomonas aeruginosa

Front 3

Give an example of a amphitrichous bacterium discussed in lecture. HINT: this particular type is a spirillum (spiral-shaped)

Back 3

Aquaspirillum

Front 4

Which spirochete-shaped bacterium causes syphilis?

Back 4

Treponema Pallidium

Front 5

What does the term "coliform" refer to?

Back 5

Any bacteria living in the GI tract

Front 6

Prokaryotes have a nucleus, true OR false?

Back 6

False

Prokaryotes lack a nucleus but the do have DNA

Front 7

Which of the following describes a bacteria with a cluster of flagella at one end?

a) monotrichous
b) amphetrichous
c) lophotrichous
d) peritrichous

Back 7

c) lophotrichous

Front 8

Flagella cause bacteria to "run and tumble" by moving in a counter-clockwise motion. Receptors sense direction of movement based on "smelling" surrounding chemicals. This is referred to as ______________.

Back 8

chemotaxis

Front 9

The cell wall of bacteria is made of ________________

Back 9

Peptidoglycan

Front 10

Gram Positive bacteria have a significantly greater amount of peptidoglycan than Gram Negative bacteria. True OR False

Back 10

TRUE

Front 11

Which of the following bacteria shapes has no flagellum but has a flexible body that allows for locomotion?

a) Spirillum-shaped
b) Vibrio-shaped
c) Spirochete-shaped

Back 11

c) Spirochetes

Both vibrio and spirillum shaped bacteria are known to have flagellum

Front 12

What does the term "autophagy" mean?

Back 12

Literally - self-eat

Front 13

Peptic ulcers are caused by a lophotichous bacteria that is spiral shaped. What is the name of this bacteria?

Back 13

Helicobactor pylori

Front 14

Internal catheters and certain prothesis (ex. hip replacement) can cause recurring ailments and need for surgery due to bacteria that forms "layers" on the foreign materials within the body. Theses layers are better known as ____________

Back 14

Biofilms

Front 15

Name the two functions of the cell wall

Back 15

Shape and protection

Front 16

Which is the most important step in Gram-staining bacteria?

Back 16

Decolorization

Front 17

The cell wall, also referred to as murien, is made up of two amino sugars. What are their names?

Back 17

NAG and NAM

Front 18

Name a chemical in Gram Positive bacteria that is not found in Gram Negative bacteria. HINT: this chemical functions as a way for bacteria to sustain at high temperatures.

Back 18

Teichoic acid

Front 19

The NAG and NAM amino sugars are connected horizontally by

a) tetrapeptides
b) peptide crossbridges

Back 19

b) peptide cross-bridges

Front 20

Where does transcription take place in eukaryotes?

Back 20

In the nucleus

It then leaves the nucleus for translation

Front 21

The process by which proteins are made is called:

a) Transcription
b) Translation
c) Transception
d) Transportation

Back 21

b) Translation

Front 22

What is the reason that Carle Woese chose to use 16-S ribosomal RNA?

Back 22

The 16-S fraction contains a highly conserved sequence of genes over a long period of evolution.

Front 23

Which domain of Carl Woese includes Whittakers four kingdoms?

Back 23

eukarya

Front 24

The reason why mitochondria are considered an independently replicating organelle is because:
A) eons ago it was an independent unit outside the cell
B) it has its own DNA
C) it has ribosomes
D) all of the above

Back 24

D

Front 25

Shape of bacteria with four on the top and four on bottom - eight total.

Back 25

sarcina

Front 26

The only coccus that is known to form endospores

Back 26

Sporrosarcina

Front 27

Name this bacteria:

Spirochete
Gram Negative
Causes syphyllis

Back 27

Treponema pallidium

Front 28

Name this bacteria:

Small rod
Gram Negative
Coliform or enteric
Green pigment
Lives in temps 4°C-37°C
Causes UTIs, diarrhea, dysentery; found in CF patients

Back 28

Pseudomonas aeruginosa

Front 29

Name this bacteria:

Coccus
Gram positive
Golden yellow color
Aerobe
Found in boils, burns, TSS

Back 29

Staphylococcus aureus

Front 30

What two characteristics do most enterics share?

Back 30

The majority are Gram negative and small rod

Front 31

Gram Positive or Negative?

- Thick petidoglycan
- Has teichoic acid
- Temps greater than 37°C
- Lesser amount of lipids in the cell wall
- No outer membrane
- Exotin

Back 31

Gram Positive

Front 32

Gram Positive or Negative

- Peptidoglycan much thinner
- No teichoic acid
- More lipid in cell wall
- Outer membrane present
- Endotoxin

Back 32

Gram Negative

Front 33

What is the function of the “O“ antigen?

Back 33

Host cell recognition

Front 34

Gram Positive bacteria contain "Lipid A" endotoxin, TRUE or FALSE?

Back 34

False

Front 35

Peptidoglycan is connected horizontally by

A) peptide cross bridges
B) NAG
C) NAM
D) tetrapeptide

Back 35

A) peptide cross bridges

Front 36

Where is endotoxin found?

Back 36

The outer membrane of Gram-negative bacteria

Front 37

Where is exotoxin found?

Back 37

The outer membrane of Gram Positive bacteria

Front 38

Tetrapeptide connects peptidoglycan …………

A) vertically
B) horizontally
C) both

Back 38

Vertically