Start Quiz: Biology 22 Prokaryotes Bacteria and Archaea

Question: The first forms of life on Earth were thought to be_________.

Choices:

single-celled plants

prokaryotes

insects

large animals such as dinosaurs

Question: The first organisms that oxygenated the atmosphere were

Choices:

cyanobacteria

phototrophic organisms

anaerobic organisms

all of the above

Question: The lipopolysaccharide layer (LPS) is a characteristic of the wall of ________.

Choices:

archaean cells

Gram-negative bacteria

bacterial prokaryotic cells

eukaryotic cells

Question: The presence of a membrane-enclosed nucleus is a characteristic of ________.

Choices:

prokaryotic cells

eukaryotic cells

all cells

viruses

Question: Prokaryotes stain as Gram-positive or Gramnegative because of differences in the cell _______.

Choices:

wall

cytoplasm

nucleus

chromosome

Question: The cell wall is ________.

Choices:

interior to the cell membrane

exterior to the cell membrane

a part of the cell membrane

interior or exterior, depending on the particular cell

Question: Halophiles are organisms that require________.

Choices:

a salt concentration of at least 0.2 M

high sugar concentration

the addition of halogens

all of the above

Question: Pseudopeptidoglycan is a characteristic of the walls of ________.

Choices:

eukaryotic cells

bacterial prokaryotic cells

archaean prokaryotic cells

bacterial and archaean prokaryotic cells

Question: Organisms most likely to be found in extreme environments are ________.

Choices:

fungi

bacteria

viruses

archaea

Question: Microbial mats __________.

Choices:

are the earliest forms of life on Earth

obtained their energy and food from hydrothermal vents

are multi-layered sheet of prokaryotes including mostly bacteria but also archaea

all of the above

Question: Which of the following consist of prokaryotic cells?

Choices:

bacteria and fungi

archaea and fungi

protists and animals

bacteria and archaea