lec.1

Question 1

What is the definition of microbiology?

Answer 1

A specialized area of biology
that deals with living things too small to be seen without magnification

Question 2

What are the microorganisms examined? (There are 7)

Answer 2

• Bacteria
  – Archaea
  – Protozoa
  – Fungi
  – Helminths
  – Viruses
  -Algae

Question 3

Which microorganisms are prokaryotes?

Answer 3

1. Bacteria
2. Archaea

Question 4

Which microorganisms are eukaryotes?

Answer 4

• Protozoa
• Fungi
• Helminths/worms

Question 5

How can microbes be both easy and difficult to study?

Answer 5

Easy- Reproduce rapidly, Can be grown in large populations in the lab

Difficult- Can’t be seen directly, viewed with microscopes

Question 6

How old is the Earth?

Answer 6

4.5 billion years old

Question 7

What are the single-celled organisms that preceded current cell types that arose 3.5 billion years ago called?

Answer 7

The Last Common Ancestor
(They are extinct)

Question 8

Archea:Unicellular or multicellular? nucleus or no nucleus?

Answer 8

single-celled, no true nucleus, distinct from bacteria

Question 9

Bacteria: Unicellular or multicellular? nucleus or no nucleus?

Answer 9

Unicellular(single-celled), no true nucleus

Question 10

Eukaryotes: Unicellular or multicellular? nucleus or no nucleus?

Answer 10

Both, True nucleus

Question 11

What are the 3 cell types that came from the Last Common Ancestor and list them in order.

Answer 11

1) Archea: Single-celled, no true nucleus- and distinct from bacteria

2) Bacteria- Single-celled- no true nucleus

3) Eukaryotes- “True nucleus.”

Question 12

What does “true nucleus” mean?

Answer 12

It contains a membrane around it.