Ch. 3.5 Lecture

Question 1

Name the characteristics of bacteria.

Answer 1

1) Cell type: Prokaryote.
2) Chromosomes: Single, or few circular
3) Types of Ribosomes: 70S
4) Contains unique ribosomes RNA signature sequence.
5) Number of sequences shared with Eukaryote: One
6) Protein synthesis not similar to eukaryote
7) Does have peptidoglycan ins cell wall
8) Cell membrane lipids contains fatty acids with esther linkages. AKA- lipid bilayer
9) No Sterols in membrane

Question 2

Name the characteristics of archaea.

Answer 2

1) Cell types: Prokaryotic
2) Chromosomes: Single, circular
3) Types of Ribosomes: 70S but structure is more similar to eukaryotes 80S.
4) Contains unique ribosomes RNA signature sequence.
5) Number of sequences shared with eukaryote: Three
6) Protein synthesis is similar to eukaryote.
7) No presence of peptidoglycan in cell wall.
8) Cell membrane lipids form long chains, branched, hydropcarbons with esther linkages.
9) No sterols in membrane

Question 3

Just know bacterial chromosomes are not…?

Answer 3

Plasmids

Question 4

Do we know if archaea are older than bacteria?

Answer 4

No

Question 5

Name the characteristics of eukaryotes.

Answer 5

1) Cell type: Eukaryote
2) Chromosomes: Several, linear
3) Type of ribosomes: 80S
4) Contains unique ribosomes RNA signature sequence.
5) All sequences are eukaryotic
6) Protein synthesis is eukaryotic
7) No presence of peptidoglycan in cell wall.
8) Cell membrane lipids are fatty acids with esther linkages
9) Sterols are present in membrane