Biology 22 Prokaryotes Bacteria and Archaea MCQ


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Photo depicts Earth from space.
This NASA image is a composite of several satellite-based views of Earth. To make the whole-Earth image, NASA scientists combine observations of different parts of the planet. (credit: NASA/GSFC/NOAA/USGS)

Viewed from space, Earth offers no clues about the diversity of life forms that reside there. The first forms of life on Earth are thought to have been microorganisms that existed for billions of years in the ocean before plants and animals appeared. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Humans have inhabited this planet for only the last 2.5 million years, and only in the last 200,000 years have humans started looking like we do today.

Unit 5. Biological Diversity

Chapter 22: Prokaryotes: Bacteria and Archaea MCQ Multiple Choices Questions Quiz Test Bank

22.1 Prokaryotic Diversity

22.2 Structure of Prokaryotes

22.3 Prokaryotic Metabolism

22.4 Bacterial Diseases in Humans

22.5 Beneficial Prokaryotes

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Biology 22 Prokaryotes Bacteria and Archaea
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Sample Questions from the Biology 22 Prokaryotes Bacteria and Archaea MCQ Quiz

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


archaean cells

Gram-negative bacteria

bacterial prokaryotic cells

eukaryotic cells

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






Question: Which of the following consist of prokaryotic cells?


bacteria and fungi

archaea and fungi

protists and animals

bacteria and archaea

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


single-celled plants



large animals such as dinosaurs

Question: The cell wall is ________.


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






Question: The first organisms that oxygenated the atmosphere were



phototrophic organisms

anaerobic organisms

all of the above

Question: Halophiles are organisms that require________.


a salt concentration of at least 0.2 M

high sugar concentration

the addition of halogens

all of the above

Question: Microbial mats __________.


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


prokaryotic cells

eukaryotic cells

all cells


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


eukaryotic cells

bacterial prokaryotic cells

archaean prokaryotic cells

bacterial and archaean prokaryotic cells

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