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Flashcards in Prokaryotes Deck (16):
0

Dif btw prok and euk cell

-prok:
-no nucles
-no membrane boune organelles
-one circular chromosome
-dsDNA in the cytoplasm
-transcription and translation is coupled

1

Plasmid

-bacteria may have a plasmid but they dont have to
-it is just extra chromosomal DNA

2

Cilia

-not involved in any locomotion
-involved in attachment

3

Flagellum

-used for locomotion
-difference in how its made from euk

4

Cell membrane or cell wall?

They have both
-cell wall made of peptidoglycan

5

Are eukaryotes more related to eubacteria or archaebacteria

Archaebacteria
-extremeophiles

6

Classificstions of bacteria

1. Cocci (spherical)

2. Bacilli (rod-shaped)

3. Spirilla (spiral-shaped)

7

Gram + bacteria

-stain dark purple during gram staining
-have cell membrane and cell wall (peptidoglycan)

8

Gram - bacteria

-stain pink during gram staining
-have cell membrane, cell wall (peptidoglycan) and outer lipopolysaccharide layer (contains endotoxins)

9

Flagellar propulsion

-used by bacteria to move
-can be used for directional motion
-----chemotaxis: movement is directed toward chemoattractants or away from chemorepellants (sensed by chemoreceptors)
-powered by ATP hydrolysis

10

Bacterial growth

-they dont undergo mitosis.
-they use fission

11

Fission

-asexual
Reproduction through growth, DNA replication, and cell division
----get more cytoplasm, replication their DNA and undergo cytokenesis
-doubling times vary but can be as short as 20 min under ideal conditions

12

Bacterial growth stages

1. Lag phase
2. Log phase
3. Stationary phase
4. Desth phase

13

Endospores

Dormant form produced by some bacteria under harsh conditions
-have a thick peptidoglycan coat and can survive through extreme conditions

14

Aerobes
Anaerobes
Faculative anaerobes

Aerobes-can survive in oxygen environment
Anaerobes- do not require oxygen to survive
Faculative anaerobes- can carry out metabolic processes with or without oxygen

15

Conjugation

-way to share genetic information

1. Growth of sex pili
2. Replication of plasmid
3. Transfer of one plasmid
4. Break pili

End with twoseparate male cells containing plasmid