Question 1

Which group of algae are associated with red tide?

Accepted Answer

A)  red algae 
B)  green algae 
C)  brown algae 
D)  diatoms 
E)  dinoflagellates 
A)  red algae 
B)  green algae 
C)  brown algae 
D)  diatoms 
E)  dinoflagellates E

Question 2

All of the following are true statements about algae except

Accepted Answer

A)  algae are eukaryotes. 
B)  algae are photoautotrophs. 
C)  algae are producers. 
D)  algae were once classified as plants. 
E)  most algae have some form of locomotion. 
A)  algae are eukaryotes. 
B)  algae are photoautotrophs. 
C)  algae are producers. 
D)  algae were once classified as plants. 
E)  most algae have some form of locomotion. E

Question 3

Which of the following structures would enable a plant virus to move from one plant cell to the next?

Accepted Answer

A)  plasmodesmata 
B)  vesicles 
C)  vacuoles 
D)  gap junctions 
E)  recognition proteins 
A)  plasmodesmata 
B)  vesicles 
C)  vacuoles 
D)  gap junctions 
E)  recognition proteins A

Question 4

Without bacteria in the environment,

Accepted Answer

A)  adequate amounts of carbon would not be available to living organisms. 
B)  plants would not be able to grow due to lack of nitrogen. 
C)  bioremediation would have limited use as a tool to clean up pollutants. 
D)  there would be a shortage of decomposer organisms. 
E)  All of the choices are correct. 
A)  adequate amounts of carbon would not be available to living organisms. 
B)  plants would not be able to grow due to lack of nitrogen. 
C)  bioremediation would have limited use as a tool to clean up pollutants. 
D)  there would be a shortage of decomposer organisms. 
E)  All of the choices are correct.

Question 5

What feature enables the paramecium to move?

Accepted Answer

A)  cilia 
B)  contractile vacuole 
C)  flagella 
D)  nucleus 
E)  pseudopodia 
A)  cilia 
B)  contractile vacuole 
C)  flagella 
D)  nucleus 
E)  pseudopodia

Question 6

Cell-like structures that may have resulted from macromolecular self-assembly are referred to as

Accepted Answer

A)  prokaryotes. 
B)  protocells. 
C)  protoypes. 
D)  archaea. 
E)  protists. 
A)  prokaryotes. 
B)  protocells. 
C)  protoypes. 
D)  archaea. 
E)  protists.

Question 7

Bacteria that secrete digestive enzymes into their surroundings in order to decompose nonliving organic matter are called

Accepted Answer

A)  chemoautotrophs. 
B)  symbiotes. 
C)  saprotrophs. 
D)  parasites. 
E)  photoautotrophs. 
A)  chemoautotrophs. 
B)  symbiotes. 
C)  saprotrophs. 
D)  parasites. 
E)  photoautotrophs.

Question 8

Which is the correct order of events in the lytic cycle of a bacteriophage?

Accepted Answer

A)  attachment - penetration - biosynthesis - maturation - release 
B)  integration - penetration - biosynthesis - maturation - release 
C)  attachment - integration - biosynthesis - maturation - release 
D)  attachment - biosynthesis - maturation - release 
E)  penetration - attachment - biosynthesis - release - maturation 
A)  attachment - penetration - biosynthesis - maturation - release 
B)  integration - penetration - biosynthesis - maturation - release 
C)  attachment - integration - biosynthesis - maturation - release 
D)  attachment - biosynthesis - maturation - release 
E)  penetration - attachment - biosynthesis - release - maturation

Question 9

Why don't new biological macromolecules form abiotically from nonliving matter on the Earth today?

Accepted Answer

A)  The special environmental conditions that are required do not exist. 
B)  There are not enough of the various elements needed. 
C)  There is not enough available energy. 
D)  There is no need for biological macromolecules. 
E)  Biological macromolecules do arise abioticallybut are quickly consumed by organisms. 
A)  The special environmental conditions that are required do not exist. 
B)  There are not enough of the various elements needed. 
C)  There is not enough available energy. 
D)  There is no need for biological macromolecules. 
E)  Biological macromolecules do arise abioticallybut are quickly consumed by organisms.

Question 10

Which of these is mismatched?

Accepted Answer

A)  cilia - bacteria 
B)  flagella - bacteria 
C)  pseudopods - slime molds 
D)  flagella - Euglena 
E)  pseudopods - amoebas 
A)  cilia - bacteria 
B)  flagella - bacteria 
C)  pseudopods - slime molds 
D)  flagella - Euglena 
E)  pseudopods - amoebas

Question 11

What would you most likely call a long chain of bacterial cells that are spherical in shape?

Accepted Answer

A)  Streptococcus 
B)  Staphylococcus 
C)  Streptobacillus 
D)  Diplococcus 
E)  Streptospirillum 
A)  Streptococcus 
B)  Staphylococcus 
C)  Streptobacillus 
D)  Diplococcus 
E)  Streptospirillum

Question 12

Your task as a researcher is to develop a new drug to prevent retrovirus infections in newly exposed individuals. Which of the means listed is likely to be the most effective?

Accepted Answer

A)  blocking enzyme action 
B)  destroying the viral genome 
C)  dissolving the capsid 
D)  preventing conjugation 
E)  disrupting the viral envelope 
A)  blocking enzyme action 
B)  destroying the viral genome 
C)  dissolving the capsid 
D)  preventing conjugation 
E)  disrupting the viral envelope

Question 13

In the infamous anthrax attacks of 2001, several letters were received at the offices of two U.S. senators and various news media outlets. The letters contained dry granular or powdery material. Seventeen people who came into contact with the material from the letters suffered anthrax infections; five more died of anthrax. How could dried-out material cause anthrax?

Accepted Answer

A)  Anthrax bacteria are acellular infectious particles. When they came into contact with living hosts, they entered the hosts' cells, took over their metabolic machinery, and caused them to produce more bacteria. 
B)  Anthrax bacteria can form endospores under harsh environmental conditions. The material in the letters contained endospores of anthrax bacteria, which germinated and grew in the more favorable environment of the victims' bodies. 
C)  Anthrax bacteria can form endospores in order to reproduce. A few active bacteria in the letters started to produce enormous numbers of endospores upon contact with the anthrax victims. 
D)  Anthrax endospores are highly motile by flagella. When the endospores came into contact with human hosts, they swarmed into the bodies of their victims. 
E)  None of the choices are correct. 
A)  Anthrax bacteria are acellular infectious particles. When they came into contact with living hosts, they entered the hosts' cells, took over their metabolic machinery, and caused them to produce more bacteria. 
B)  Anthrax bacteria can form endospores under harsh environmental conditions. The material in the letters contained endospores of anthrax bacteria, which germinated and grew in the more favorable environment of the victims' bodies. 
C)  Anthrax bacteria can form endospores in order to reproduce. A few active bacteria in the letters started to produce enormous numbers of endospores upon contact with the anthrax victims. 
D)  Anthrax endospores are highly motile by flagella. When the endospores came into contact with human hosts, they swarmed into the bodies of their victims. 
E)  None of the choices are correct.

Question 14

Protists can be

Accepted Answer

A)  unicellular only. 
B)  unicellular or colonial, but not multicellular. 
C)  colonial only. 
D)  colonial or multicellular, but not unicellular. 
E)  unicellular, colonial, or multicellular. 
A)  unicellular only. 
B)  unicellular or colonial, but not multicellular. 
C)  colonial only. 
D)  colonial or multicellular, but not unicellular. 
E)  unicellular, colonial, or multicellular.

Question 15

You take a large sample of soil and divide it among individual pots. You then separate the pots into two groups. In the first group, every pot of soil has been sterilized. In the second group, none of the pots of soil have been sterilized. You plant soybean seeds in all the pots. What would you expect to see as the seeds sprout and grow?

Accepted Answer

A)  The plants growing in the sterile soil are bigger because they have not been exposed to any bacteria. 
B)  The plants growing in the non-sterile soil are bigger because they have mutualistic associations with nitrogen-fixing bacteria. 
C)  The plants growing in the sterile soil are bigger because they do not have to compete with nitrogen-fixing bacteria in order to obtain usable nitrogen. 
D)  The plants growing in the non-sterile soil are bigger because saprotrophic bacteria produce nutrients for them. 
E)  There is no difference in size between the plants growing in the sterile soil and those in the non-sterile soil. 
A)  The plants growing in the sterile soil are bigger because they have not been exposed to any bacteria. 
B)  The plants growing in the non-sterile soil are bigger because they have mutualistic associations with nitrogen-fixing bacteria. 
C)  The plants growing in the sterile soil are bigger because they do not have to compete with nitrogen-fixing bacteria in order to obtain usable nitrogen. 
D)  The plants growing in the non-sterile soil are bigger because saprotrophic bacteria produce nutrients for them. 
E)  There is no difference in size between the plants growing in the sterile soil and those in the non-sterile soil.

Question 16

The _____of a virus is enclosed by a _____capsid.

Accepted Answer

A)  nucleic acid; protein 
B)  membrane; protein 
C)  nucleic acid; membrane 
D)  protein; nucleic acid 
E)  RNA; DNA 
A)  nucleic acid; protein 
B)  membrane; protein 
C)  nucleic acid; membrane 
D)  protein; nucleic acid 
E)  RNA; DNA

Question 17

Retroviruses

Accepted Answer

A)  contain DNA. 
B)  contain the enzyme reverse transcriptase. 
C)  produce RNA from DNA. 
D)  only invade plants. 
E)  produce protein directly from DNA. 
A)  contain DNA. 
B)  contain the enzyme reverse transcriptase. 
C)  produce RNA from DNA. 
D)  only invade plants. 
E)  produce protein directly from DNA.

Question 18

Archaea

Accepted Answer

A)  have plasma membranes but lack cell walls. 
B)  have plasma membranes, and most have cell walls. 
C)  lack plasma membranes, but most have cell walls. 
D)  have neither plasma membranes nor cell walls. 
E)  have double plasma membranes and no cell walls. 
A)  have plasma membranes but lack cell walls. 
B)  have plasma membranes, and most have cell walls. 
C)  lack plasma membranes, but most have cell walls. 
D)  have neither plasma membranes nor cell walls. 
E)  have double plasma membranes and no cell walls.

Question 19

Which of these is mismatched?

Accepted Answer

A)  malaria - protozoan 
B)  AIDS - virus 
C)  kuru - prion 
D)  tetanus - bacterium 
E)  food poisoning - archaea 
A)  malaria - protozoan 
B)  AIDS - virus 
C)  kuru - prion 
D)  tetanus - bacterium 
E)  food poisoning - archaea

Question 20

Cyanobacteria are important producers, more specifically called

Accepted Answer

A)  photoautotrophs. 
B)  saprotrophs. 
C)  chemoautotrophs. 
D)  saproautotrophs. 
E)  photoheterotrophs. 
A)  photoautotrophs. 
B)  saprotrophs. 
C)  chemoautotrophs. 
D)  saproautotrophs. 
E)  photoheterotrophs.

Exam 17: Viruses, Bacteria, and Protists

Which group of algae are associated with red tide?

All of the following are true statements about algae except

Which of the following structures would enable a plant virus to move from one plant cell to the next?

Without bacteria in the environment,

What feature enables the paramecium to move?

Cell-like structures that may have resulted from macromolecular self-assembly are referred to as

Bacteria that secrete digestive enzymes into their surroundings in order to decompose nonliving organic matter are called

Which is the correct order of events in the lytic cycle of a bacteriophage?

Why don't new biological macromolecules form abiotically from nonliving matter on the Earth today?

Which of these is mismatched?

What would you most likely call a long chain of bacterial cells that are spherical in shape?

Your task as a researcher is to develop a new drug to prevent retrovirus infections in newly exposed individuals. Which of the means listed is likely to be the most effective?

Protists can be

The _____of a virus is enclosed by a _____capsid.

Retroviruses

Archaea

Which of these is mismatched?

Cyanobacteria are important producers, more specifically called

Biology: the Science of Life

The Chemical Basis of Life

The Organic Molecules of Life

Inside the Cell

The Dynamic Cell

Energy for Life

Energy for Cells

Cellular Reproduction

Meiosis and the Genetic Basis of Sexual Reproduction

Patterns of Inheritance

Dna Biology

Biotechnology and Genomics

Mutations and Genetic Testing

Darwin and Evolution

Evolution on a Small Scale

Evolution on a Large Scale

Plants and Fungi

Animals

Plant Anatomy and Growth

Plant Responses and Reproduction

Being Organized and Steady

The Transport Systems

The Maintenance Systems

Digestion and Human Nutrition

Defenses Against Disease

The Control Systems

Sensory Input and Motor Output

Reproduction and Embryonic Development

Ecology and Populations

Communities and Ecosystems

Human Impact on the Biosphere

Filters

The _of a virus is enclosed by a _capsid.