Archaea: Extreme Environment Organisms

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What is the characteristic feature of archaeal lipids and membranes?

Branched chain hydrocarbons attached to glycerol by ether linkages (correct)

Unbranched chain hydrocarbons attached to glycerol by peptide linkages

Linear chain hydrocarbons attached to glycerol by amide linkages

Fatty acids attached to glycerol by ester linkages

Which of the following is NOT a characteristic of archaeal cell walls?

Presence of a layer of pseudomurein

Variation in cell wall composition

Presence of a layer of peptidoglycan (correct)

Lack of peptidoglycan

What is the term used to describe microorganisms that thrive in extreme environments?

Mesophiles

Thermophiles

Psychrophiles

Extremophiles (correct)

Which of the following archaea is found in acidic hot springs?

Sulfolobus Signup and view all the answers

What is the difference between archaeal and bacterial flagella?

Archaeal flagella are thinner and have multiple types of flagellin protein Signup and view all the answers

Which of the following is an example of a mesophilic archaeon?

Many archaea found in marine, arctic, temperate, and tropical habitats Signup and view all the answers

What is the term used to describe microorganisms that thrive in high salt concentrations?

Halophiles Signup and view all the answers

What is the characteristic shape of some archaea?

Flat squares Signup and view all the answers

Which of the following is an example of an archaeon that lives in deep ocean hydrothermal vents?

Staphylothermus Signup and view all the answers

What is the function of ether linkages in archaeal lipids and membranes?

To increase stability to higher temperatures Signup and view all the answers

What is the primary characteristic of archaeal lipids and membranes that distinguishes them from bacterial lipids and membranes?

Attachment of lipids to glycerol by ether linkages Signup and view all the answers

What is the term used to describe the morphology of archaea that are flat and square in shape?

Square-shaped Signup and view all the answers

What is the primary component of archaeal cell walls that is absent in bacterial cell walls?

Peptidoglycan Signup and view all the answers

Which of the following archaea is NOT an example of an extremophile?

Escherichia Signup and view all the answers

What is the primary difference between archaeal and bacterial flagella?

Thickness Signup and view all the answers

What is the term used to describe the growth of archaea in environments with high temperatures?

Thermophily Signup and view all the answers

What is the primary characteristic of archaea that allows them to thrive in extreme environments?

Unique membrane lipids Signup and view all the answers

Which of the following is an example of an archaeon that lives in a non-extreme environment?

Archaeoglobus Signup and view all the answers

What is the primary difference between archaeal and bacterial membranes?

Type of lipid linkage Signup and view all the answers

What is the term used to describe the diversity of archaea in terms of morphology, physiology, and ecology?

High diversity Signup and view all the answers