Question 1

Which of the following statements concerning biofilms is FALSE?

Accepted Answer

A) They consist of assemblages of cells enclosed in a matrix of molecules. 
B) They are composed of bacteria but not archaea. 
C) They require communication and signaling among cells. 
D) An example is the film that develops on unbrushed teeth. 
E) They increase the chances for survival of cells in the biofilm. 
A) They consist of assemblages of cells enclosed in a matrix of molecules. 
B) They are composed of bacteria but not archaea. 
C) They require communication and signaling among cells. 
D) An example is the film that develops on unbrushed teeth. 
E) They increase the chances for survival of cells in the biofilm.

Question 2

Which of the following statements does NOT describe the plasma membrane of prokaryotes?

Accepted Answer

A) Like eukaryotic plasma membranes, it is a lipid bilayer. 
B) Like eukaryotic plasma membranes, it contains proteins and sterols. 
C) In aerobic species, it is the site of the electron transport chain. 
D) In some photosynthetic species it is the site of photosynthesis. 
E) It has attachment sites for daughter chromosomes during cell division. 
A) Like eukaryotic plasma membranes, it is a lipid bilayer. 
B) Like eukaryotic plasma membranes, it contains proteins and sterols. 
C) In aerobic species, it is the site of the electron transport chain. 
D) In some photosynthetic species it is the site of photosynthesis. 
E) It has attachment sites for daughter chromosomes during cell division.

Question 3

Some bacteria are capable of fixing atmospheric nitrogen to form nitrogen-containing compounds.

Accepted Answer

A) True 
 B)False

Question 4

In prokaryotes, poly-β-hydroxybutyric acid rather than glycogen is the major storage substance.

Accepted Answer

A) True 
 B)False

Question 5

By definition, autotrophs differ from heterotrophs in that autotrophs:

Accepted Answer

A) use inorganic compounds as an energy source. 
B) use light as an energy source. 
C) use carbon dioxide as their sole source of carbon. 
D) obtain their carbon from dead organic matter. 
E) obtain their energy from dead organic matter. 
A) use inorganic compounds as an energy source. 
B) use light as an energy source. 
C) use carbon dioxide as their sole source of carbon. 
D) obtain their carbon from dead organic matter. 
E) obtain their energy from dead organic matter.

Question 6

A coccus has a ______ shape.

Accepted Answer

A) spherical 
B) spiral 
C) cylindrical 
D) curved 
E) triangular 
A) spherical 
B) spiral 
C) cylindrical 
D) curved 
E) triangular

Question 7

A virus can reproduce inside and outside a host cell.

Accepted Answer

A) True 
 B)False

Question 8

In the process of nitrogen fixation:

Accepted Answer

A) Photosystem II occurs but not Photosystem I. 
B) cyclic photophosphorylation does not occur. 
C) oxygen is produced as a waste product. 
D) nitrogen gas is converted to amino acids. 
E) nitrogen gas is converted to ammonium. 
A) Photosystem II occurs but not Photosystem I. 
B) cyclic photophosphorylation does not occur. 
C) oxygen is produced as a waste product. 
D) nitrogen gas is converted to amino acids. 
E) nitrogen gas is converted to ammonium.

Question 9

The prokaryotes are the most dominant and successful organisms on Earth.

Accepted Answer

A) True 
 B)False

Question 10

In the photosynthetic purple bacteria, photosynthesis occurs in the:

Accepted Answer

A) pili. 
B) glycocalyx. 
C) cell wall. 
D) nucleoid. 
E) plasma membrane. 
A) pili. 
B) glycocalyx. 
C) cell wall. 
D) nucleoid. 
E) plasma membrane.

Question 11

Mycoplasmas have cell walls containing peptidoglycan.

Accepted Answer

A) True 
 B)False

Question 12

Viruses are spread from diseased to healthy plants primarily by bacteria.

Accepted Answer

A) True 
 B)False

Question 13

Prokaryotic flagella differ from eukaryotic flagella in that prokaryotic flagella:

Accepted Answer

A) are surrounded by a plasma membrane. 
B) consist of microtubules. 
C) consist of subunits of flagellin. 
D) are long, slender appendages. 
E) are involved in motility. 
A) are surrounded by a plasma membrane. 
B) consist of microtubules. 
C) consist of subunits of flagellin. 
D) are long, slender appendages. 
E) are involved in motility.

Question 14

Which of the following statements concerning plant viral infections is FALSE?

Accepted Answer

A) The viruses penetrate the cell wall. 
B) Once inside the cell, the virion sheds its capsid. 
C) The viral nucleic acid takes over the genetic machinery of the host cell. 
D) Additional nucleic acids are produced. 
E) Viral nucleic acids and proteins are assembled into additional virus particles. 
A) The viruses penetrate the cell wall. 
B) Once inside the cell, the virion sheds its capsid. 
C) The viral nucleic acid takes over the genetic machinery of the host cell. 
D) Additional nucleic acids are produced. 
E) Viral nucleic acids and proteins are assembled into additional virus particles.

Question 15

The heterocysts of cyanobacteria are most closely associated with:

Accepted Answer

A) sporulation. 
B) nitrogen fixation. 
C) photosynthesis. 
D) gliding movements. 
E) buoyancy. 
A) sporulation. 
B) nitrogen fixation. 
C) photosynthesis. 
D) gliding movements. 
E) buoyancy.

Question 16

What prokaryotes lack a cell wall and cause highly destructive diseases such as X-disease of peach?

Accepted Answer

A) prochlorophytes 
B) cyanobacteria 
C) purple nonsulfur bacteria 
D) green nonsulfur bacteria 
E) phytoplasmas 
A) prochlorophytes 
B) cyanobacteria 
C) purple nonsulfur bacteria 
D) green nonsulfur bacteria 
E) phytoplasmas

Question 17

The cell walls of Bacteria differ from those of Archaea and eukaryotes in that the cell walls of Bacteria contain:

Accepted Answer

A) cellulose. 
B) sterols. 
C) peptidoglycans. 
D) phospholipids. 
E) poly-β-hydroxybutyric acid. 
A) cellulose. 
B) sterols. 
C) peptidoglycans. 
D) phospholipids. 
E) poly-β-hydroxybutyric acid.

Question 18

In prokaryotes, poly-β-hydroxybutyric acid is a storage compound occurring:

Accepted Answer

A) in the nucleoid. 
B) in the plasma membrane. 
C) in the cell wall. 
D) as inclusion bodies. 
E) as fimbriae. 
A) in the nucleoid. 
B) in the plasma membrane. 
C) in the cell wall. 
D) as inclusion bodies. 
E) as fimbriae.

Question 19

Structures called _______ connect two cells and draw them together for DNA transfer.

Accepted Answer

A) pili 
B) flagellin 
C) flagella 
D) fimbriae 
E) nanotubes 
A) pili 
B) flagellin 
C) flagella 
D) fimbriae 
E) nanotubes

Question 20

The smallest known photosynthetic organism is a prochlorophyte called Prochlorococcus.

Accepted Answer

A) True 
 B)False

Exam 13: Prokaryotes and Viruses

Which of the following statements concerning biofilms is FALSE?

Which of the following statements does NOT describe the plasma membrane of prokaryotes?

Some bacteria are capable of fixing atmospheric nitrogen to form nitrogen-containing compounds.

In prokaryotes, poly-β-hydroxybutyric acid rather than glycogen is the major storage substance.

By definition, autotrophs differ from heterotrophs in that autotrophs:

A coccus has a ______ shape.

A virus can reproduce inside and outside a host cell.

In the process of nitrogen fixation:

The prokaryotes are the most dominant and successful organisms on Earth.

In the photosynthetic purple bacteria, photosynthesis occurs in the:

Mycoplasmas have cell walls containing peptidoglycan.

Viruses are spread from diseased to healthy plants primarily by bacteria.

Prokaryotic flagella differ from eukaryotic flagella in that prokaryotic flagella:

Which of the following statements concerning plant viral infections is FALSE?

The heterocysts of cyanobacteria are most closely associated with:

What prokaryotes lack a cell wall and cause highly destructive diseases such as X-disease of peach?

The cell walls of Bacteria differ from those of Archaea and eukaryotes in that the cell walls of Bacteria contain:

In prokaryotes, poly-β-hydroxybutyric acid is a storage compound occurring:

Structures called _______ connect two cells and draw them together for DNA transfer.

The smallest known photosynthetic organism is a prochlorophyte called Prochlorococcus.

Botany: an Introduction

The Molecular Composition of Plant Cells

The Plant Cell and the Cell Cycle

The Movement of Substances Into and Out of Cells

The Flow of Energy

Respiration

Photosynthesis, Light, and Life

Sexual Reproduction and Heredity

The Chemistry of Heredity and Gene Expression

Recombinant Dna Technology, Plant Biotechnology, and Genomics

The Process of Evolution

Systematics: the Science of Biological Diversity

Fungi

Protists: Algae and Heterotrophic Protists

Bryophytes

Seedless Vascular Plants

Gymnosperms

Introduction to the Angiosperms

Evolution of the Angiosperms

Plants and People

Early Development of the Plant Body

Cells and Tissues of the Plant Body

The Root: Structure and Development

The Shoot: Primary Structure and Development

Secondary Growth in Stems

Regulating Growth and Development: the Plant Hormones

External Factors and Plant Growth

Plant Nutrition and Soils

The Movement of Water and Solutes in Plants

The Dynamics of Communities and Ecosystems

Global Ecology

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