Question 1

Which group of photosynthetic prokaryotes has bacteriochlorophyll and only one photosystem?

Accepted Answer

A) mycoplasmas 
B) purple and green bacteria 
C) spiroplasmas 
D) cyanobacteria 
E) prochlorophytes 
A) mycoplasmas 
B) purple and green bacteria 
C) spiroplasmas 
D) cyanobacteria 
E) prochlorophytes B

Question 2

A viral capsid is a:

Accepted Answer

A) protein coat. 
B) strand of DNA. 
C) strand of RNA. 
D) plasma membrane. 
E) type of organelle. 
A) protein coat. 
B) strand of DNA. 
C) strand of RNA. 
D) plasma membrane. 
E) type of organelle. A

Question 3

Within an infected plant, viruses move from cell to cell through plasmodesmata in a process facilitated by movement proteins.

Accepted Answer

A) True 
 B)False  True

Question 4

The cell walls of gram-positive and gram-negative Bacteria differ in that gram-positive species have cell walls:

Accepted Answer

A) with less peptidoglycan. 
B) of greater thickness. 
C) consisting of two layers. 
D) with a layer of lipopolysaccharides. 
E) with a structure similar to that of the plasma membrane. 
A) with less peptidoglycan. 
B) of greater thickness. 
C) consisting of two layers. 
D) with a layer of lipopolysaccharides. 
E) with a structure similar to that of the plasma membrane.

Question 5

Prokaryotes that can grow in the presence of oxygen, even though they cannot use oxygen, are called:

Accepted Answer

A) facultative anaerobes. 
B) facultative aerobes. 
C) photosynthetic autotrophs. 
D) psychrophiles. 
E) thermophiles 
A) facultative anaerobes. 
B) facultative aerobes. 
C) photosynthetic autotrophs. 
D) psychrophiles. 
E) thermophiles

Question 6

______ are archaeans living in regions of very high salt concentration.

Accepted Answer

A) Mycoplasmas 
B) Extreme thermophiles 
C) Members of the genus Thermoplasma 
D) Extreme halophiles 
E) Methanogens 
A) Mycoplasmas 
B) Extreme thermophiles 
C) Members of the genus Thermoplasma 
D) Extreme halophiles 
E) Methanogens

Question 7

In the process of conjugation, DNA is transferred from one cell to another via pili.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following statements about the environmental ranges of cyanobacteria is FALSE?

Accepted Answer

A) Most species are symbiotic. 
B) Some species grow in hot springs. 
C) Some species grow in Antarctic lakes. 
D) Some species grow in acidic waters. 
E) Some species grow in the fur of polar bears. 
A) Most species are symbiotic. 
B) Some species grow in hot springs. 
C) Some species grow in Antarctic lakes. 
D) Some species grow in acidic waters. 
E) Some species grow in the fur of polar bears.

Question 9

Transduction is a type of lateral gene transfer.

Accepted Answer

A) True 
 B)False

Question 10

A viral disease of plants in which the symptoms are small, light-colored flecks intermingled with the normal green of leaves and fruit is called:

Accepted Answer

A) ring spot. 
B) yellows. 
C) canker. 
D) leaf roll. 
E) mosaic. 
A) ring spot. 
B) yellows. 
C) canker. 
D) leaf roll. 
E) mosaic.

Question 11

The great majority of plant viruses have a genome composed of single-stranded RNA.

Accepted Answer

A) True 
 B)False

Question 12

Stromatolites are produced when cyanobacteria:

Accepted Answer

A) bind calcium-rich sediments. 
B) produce sheaths covered with ice crystals. 
C) react with the minerals in hot springs. 
D) interact with fur. 
E) interact with the roots of higher plants. 
A) bind calcium-rich sediments. 
B) produce sheaths covered with ice crystals. 
C) react with the minerals in hot springs. 
D) interact with fur. 
E) interact with the roots of higher plants.

Question 13

The glycocalyx is a:

Accepted Answer

A) type of bacterial plasmid. 
B) convoluted infolding of the prokaryotic plasma membrane. 
C) type of inclusion body in prokaryotic cells. 
D) constituent of the cell wall of gram-positive Bacteria. 
E) slimy or gummy substance coating the outer surface of the prokaryotic cell wall. 
A) type of bacterial plasmid. 
B) convoluted infolding of the prokaryotic plasma membrane. 
C) type of inclusion body in prokaryotic cells. 
D) constituent of the cell wall of gram-positive Bacteria. 
E) slimy or gummy substance coating the outer surface of the prokaryotic cell wall.

Question 14

Phylogenetic analysis indicates that there are at least ______ major lineages of Bacteria.

Accepted Answer

A) 4 
B) 5 
C) 8 
D) 17 
E) 20 
A) 4 
B) 5 
C) 8 
D) 17 
E) 20

Question 15

Viroids consist only of a:

Accepted Answer

A) protein capsid. 
B) linear DNA molecule. 
C) circular DNA molecule. 
D) linear RNA molecule. 
E) circular RNA molecule. 
A) protein capsid. 
B) linear DNA molecule. 
C) circular DNA molecule. 
D) linear RNA molecule. 
E) circular RNA molecule.

Question 16

Which of the following statements about the ecological role of prokaryotes is FALSE?

Accepted Answer

A) Autotrophic species make major contributions to the global carbon balance. 
B) Certain species fix atmospheric nitrogen. 
C) Decomposers recycle materials from the bodies of dead organisms. 
D) Certain bacteria degrade pesticides and other synthetic substances. 
E) Certain prokaryotes are currently the most widely used method for cleaning up toxic dumps. 
A) Autotrophic species make major contributions to the global carbon balance. 
B) Certain species fix atmospheric nitrogen. 
C) Decomposers recycle materials from the bodies of dead organisms. 
D) Certain bacteria degrade pesticides and other synthetic substances. 
E) Certain prokaryotes are currently the most widely used method for cleaning up toxic dumps.

Question 17

Prokaryotes that use inorganic compounds rather than light as an energy source are called:

Accepted Answer

A) heterotrophs. 
B) chemosynthetic autotrophs. 
C) photosynthetic autotrophs. 
D) psychrophiles. 
E) saprotrophs. 
A) heterotrophs. 
B) chemosynthetic autotrophs. 
C) photosynthetic autotrophs. 
D) psychrophiles. 
E) saprotrophs.

Question 18

One method by which prokaryotes reproduce asexually is binary fission.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following statements concerning the hypersensitive response is FALSE?

Accepted Answer

A) It is a response to infection by different types of pathogens. 
B) It is usually mediated by recessive genes. 
C) It includes host cell death at the infection site. 
D) It includes the accumulation of antimicrobial molecules. 
E) It inhibits pathogen movement at the edge of the lesion. 
A) It is a response to infection by different types of pathogens. 
B) It is usually mediated by recessive genes. 
C) It includes host cell death at the infection site. 
D) It includes the accumulation of antimicrobial molecules. 
E) It inhibits pathogen movement at the edge of the lesion.

Question 20

The great majority of viruses have a genome composed of:

Accepted Answer

A) single-stranded RNA. 
B) single-stranded DNA. 
C) double-stranded RNA. 
D) double-stranded DNA. 
E) RNA and DNA. 
A) single-stranded RNA. 
B) single-stranded DNA. 
C) double-stranded RNA. 
D) double-stranded DNA. 
E) RNA and DNA.

Exam 13: Prokaryotes and Viruses

Which group of photosynthetic prokaryotes has bacteriochlorophyll and only one photosystem?

A viral capsid is a:

Within an infected plant, viruses move from cell to cell through plasmodesmata in a process facilitated by movement proteins.

The cell walls of gram-positive and gram-negative Bacteria differ in that gram-positive species have cell walls:

Prokaryotes that can grow in the presence of oxygen, even though they cannot use oxygen, are called:

______ are archaeans living in regions of very high salt concentration.

In the process of conjugation, DNA is transferred from one cell to another via pili.

Which of the following statements about the environmental ranges of cyanobacteria is FALSE?

Transduction is a type of lateral gene transfer.

A viral disease of plants in which the symptoms are small, light-colored flecks intermingled with the normal green of leaves and fruit is called:

The great majority of plant viruses have a genome composed of single-stranded RNA.

Stromatolites are produced when cyanobacteria:

The glycocalyx is a:

Phylogenetic analysis indicates that there are at least ______ major lineages of Bacteria.

Viroids consist only of a:

Which of the following statements about the ecological role of prokaryotes is FALSE?

Prokaryotes that use inorganic compounds rather than light as an energy source are called:

One method by which prokaryotes reproduce asexually is binary fission.

Which of the following statements concerning the hypersensitive response is FALSE?

The great majority of viruses have a genome composed of:

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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