Chapter 3: Cell Structure Flashcards
1
Q
What are the characteristics of a prokaryote? (4)
A
- DNA is not enclosed within the nucleus
- Usually a DNA is arranged an one circular xme
- They lack membrane-enclosed organelles
- Single celled organisms (Bacteria, Archaea)
2
Q
What does “karyon” mean?
A
nucleus
3
Q
Where is DNA stored in prokaryotes?
A
nucleoid region
4
Q
What are characteristics of eukaryotes? (5)
A
- DNA in the nucleus, surrounded by a nuclear membrane
- DNA is arranged as multiple xmes
- membrane-enclosed organelles
- singled celled or multicellular
- algae, protozoa, fungi, plants, animals
5
Q
What are plasmids?
A
external pieces of DNA
6
Q
Name the 5 types of bacteria shapes (morphology).
A
- coccus (pl. cocci)
- bacillus (pl. bacilli)
- Vibrio
- Spirillum (pl. Spirilla)
- Spirochete
7
Q
What is the shape of coccus?
A
spehrical
8
Q
What is the shape of bacillus?
A
- rod shaped
9
Q
What is the shape of vibrio?
A
curved
10
Q
What is the shape of spirillum?
A
- spiral shaped
11
Q
What is the shape of spirochete?
A
- corkscrew shaped
