Lab Exam Of Eukaryotic Microbes

Question 1

What classification group do Protists come from?

What is their cellularity and energy and food source?

Answer 1

Protists are a group made up of Protozoa

They are unicellular, heterotrophs

Question 2

Protists life cycle has two stages, what are they?

Answer 2

Trophoozoitote- vegetative

Cyst- resting stage

Question 3

What is the way different protists are divided or differentiated by?

Answer 3

Divided based on locomotion

Question 4

What are the three examples of movement given in class and give an example of an organism.

Answer 4

Sarcodina - Ex. Amoeba that move by pseudopod-cytoplasmic extensions

Ciliates- move by cilia

Mastigophora- move by flagella, ex Euglena

Question 5

What are the 5 medically important Protozoa given in class?

Answer 5

Entamoeba histolytica

Balantidium coli

Paramecium

Trypanosoma

Giardia lamblia

Question 6

What is an Entamoeba histolytica?

What causes this?

What are the symptoms?

Answer 6

It’s an amoeba

Causes amoebic dysentery

Produces a cyst that is ingested by the host either (oral-fecal contamination)

Symptoms: abdominal pain, diarrhea. Blood in feces, and vomiting

Question 7

What is Balantidium coli?

What is found in its life cycle and where are they found?

Compare them to E. hisolytica based on this symptom.

Answer 7

B. coli - Ciliate

Has a Trophozoite and cyst in its life cycle

It causes bloody diarrhea - however less sever than E. hisolytica

Question 8

What is a ciliate and not a pathogen?

Answer 8

Paramecium

Question 9

What is a falgellate, that is a blood parasite that causes African Sleeping Sickness?

Answer 9

Trypanosoma

Question 10

What causes abdominal pain, diarrhea, but mostly asymptomatic? How does this leave the body?

Answer 10

Giardia lamblia - a flagellate

Causes giardiasis
Forms cysts that are shed in the feces
Causes abdominal pain, diarrhea, however its mostly asymptomatic

Question 11

What causes Malaria and what do we look for to confirm it?

Answer 11

Plasmodium - apicomplexa

Causes the disease Malaria

Find the Ring Stage in red blood cells

Question 12

What is Algae

Answer 12

Photosynthetic
Unicellular
Green Algae are unicellular and in fresh water

Red algae, Brown Algae

Question 13

What is Spirogyra?

Answer 13

Green algae that have spiral chloroplast

Question 14

What is Volvox?

Answer 14

Colonia green algae

Has a spherical aggregation of cells

Question 15

What is Diatomes?

Answer 15

They have a cell wall that is made of silica, which the wall is divided into two haves like a Petri dish

Question 16

What is Oscillatoria?

Answer 16

Green algae

Question 17

Fungi. What are the two common ones that are taught in this class?

What are their cellularity?

Answer 17

Yeast and molds are fungi

Yeasts are unicellular

Molds are multicellular

Question 18

Are fungi motile or nonmotile?

What is their cell wall made of?

Answer 18

Fungi are nonmotile

Their cell wall is made of Chitin; not cellulose as in plants

Question 19

How do they get their food?

What are two forms and what are their food source?

Answer 19

They have no mouth, therefore they have to absorb their food

They are Heterotrophs

Saprophyte- live on dead organic matter

Parasite- live on living organisms and cause infection

Question 20

What fungi is used in bread, wine and beer making?

What is their cellularity?

How do they reproduce?

Answer 20

Saccharomyces cerevisiae which is a yeast

They are unicellular with no mycelium, they are 10 times larger than E. coli

They reproduce by budding

Question 21

What causes Thrush in the oral cavity, and vulvovaginitis of the female genitals?

Answer 21

Candida albicans

Question 22

What is yeast-like that is the normal Microbiota in the respiratory system and found in the female urogenital tract?

Answer 22

Candida albicans

Question 23

What can cause disease in immunodeficient patients or those that are on an antibiotic therapy?

Answer 23

Candida albicans

Question 24

What type of mold produces a white or grayish colony and the spores look like a salt and pepper appearance?

Where are the spores produced

Answer 24

Rhizopus

The spores are produced within the Sporangium

Rhizopus forms mycelium

Question 25

In Rhizopus, what is formed in the sporangium?

What is R. stolonifer?

Answer 25

Produces Sporangiospore, which is formed in the sporangium

R. stolonifer is common black bread mold

Question 26

How does Rhizopus reproduce?

Answer 26

Rhizopus produces sexual spores.

Question 27

What is Aspergillus?

What does it produce and where is this located?

Answer 27

Aspergillus is a mold

Produces green to yellow to brown colonies

Produces conidiospores (chain of conidia), which means dust

The conidiospores are located at the end of conidiophore

Question 28

What produces black colonies and causes disease in grapes and onions?

Answer 28

A. niger

Question 29

What are some uses of Aspergillus in industry?

Answer 29

A. oryzae and A. soyae are used in production of soy sauce fermentation

Some produce citric acid

Question 30

Define and describe penicillium

Answer 30

Penicillium is a mold

Green, powdery colony
Produces a chain of spherical conidia located at the ends of the conidiophores

Spores produce a brush-shaped conidia

Produces the antibiotic penicillin