2.) Prokaryotes Have Many Uses in Our World. Three Examples Are

9/4/06 SI Worksheet

Fill in the Blanks:

1.) ______are gram-positive bacteria that lack cell walls and can cause walking pneumonia.

2.) Prokaryotes have many uses in our world. Three examples are:

1.) ______

2.) ______

3.) ______

3.) Domain Archea has four main clades, but you are only responsible for ______and ______.

4.) Clade ______contains the extreme thermophiles, which are organisms that live in ______environments

5.) A ______has metabolism that produces methane gas, and it is found in organisms known as ______.

6.) O2is a poisonous substance to ______anaerobic bacteria, which explains why those organisms are found inside their host.

7.)A ______is a general term for a group of organisms that share certain characteristics.

8.) ______are salt lovers and are found in the Great Salt Lake and the Dead Sea.

9.) Clade Euryarcheota contains the ______and ______.

.

10.) Thermophiles often use ______for metabolism.

11.) ______, also a gram-positive bacterium, can serve as the source of some antibiotics.

Quiz

1.) Which of the following is not true of peptidoglycan?

a.) It is composed of modified-sugar polymers.

b.) It anchors other molecules in the surface of a bacterium.

c.) Gram-Positive bacteria have a relatively large amount if it.

d.) It is found in the cell walls of all prokaryotes.

e.) It is located outside the plasma membrane of most bacteria.

2.) Photoautotrophs use

a.) light as an energy source and CO2 as a carbon source.

b.) light as an energy source and methane as a carbon source.

c.) N2 as an energy source and CO2 as a carbon source.

d.) CO2 as both an energy and carbon source.

e.) H2S as an energy source and CO2 as a carbon source.

3.) Which of the following statements is not true?

a.) Archaea and bacteria have different membrane lipids.

b.) Both archaea and bacteria generally lack membrane-enclosed organelles.

c.) The cell walls of achaea lack peptidoglycan.

d.) Only bacteria have histones associated with DNA.

e.) Bacteria include spirochetes.

4.) Which of the following features of prokaryotic biology involves metabolic cooperation among cells?

a.) binary fissionc.) endotoxin releasee.) photoautotrophy

b.) endospore formationd.) biofilms

5.) Which of the following statements about archaea is not true?

a.) Archaea include euryarchaeotes and crenarchaeotes.

b.) Archaea include methanogens and extreme thermophiles.

c.) Archaea are not found in terrestrial habitats.

d.) Archaea share features with both bacteria and eukaryotes.

e.) Archaea are distinguished from bacteria based partly on molecular systems.

6.) Which prokaryotic group is mismatched with its members?

a.) Proteobacteria- diverse gram-negative bacteria

b.) Chlamydias- intracellular parasites

c.) Spirochetes-helical heterotrophs

d.) Gram-positive bacteria- symbionts in legume root nodules

e.) Cyanobacteria-solitary and colonial photoautrotrophs

7.) What kind of relationship exists between the Lyme Disease causing bacterium and humans?

a.) Mutualismb.)commensalismsc.) parasitism

d.) metabolic cooperatione.) none of the above