Chapter 16: Archaea

Question 1

Common traits of archaea

Answer 1

Ether-linked lipids
Absence of peptidoglycan
Complex RNA polymerase

Question 2

Compatible solutes

Answer 2

The internalization of solutes to prevent dehydration in halophiles

Question 3

Unsaturated lipids

Answer 3

Interspersing of alkene bonds
Hyperthermophilic adaptation
Found in methanopyrus

Question 4

Ether linkages

Answer 4

Placing oxygen atom before long chain (usually on either side)

Question 5

Large periplasm

Answer 5

Acts as insulation in hyperthermophilic environments

Question 6

Factors contributing to thermostability

Answer 6

Abundance of alpha helices
Hydrophobic protein cores
Chaperonins like thermosomes that can refold partially denatured proteins
Reverse DNA gyrases that introduce positive supercoils
Higher proportion of G-C bonds