Question 1

What is the leading scientific hypothesis explaining how the endomembrane system of eukaryotic cells originated?

Accepted Answer

A)  From the inward folding of the plasma membrane 
B)  From engulfing prokaryotic cells 
C)  From engulfing eukaryotic cells 
D)  From the spontaneous coalescence of phospholipids 
A)  From the inward folding of the plasma membrane 
B)  From engulfing prokaryotic cells 
C)  From engulfing eukaryotic cells 
D)  From the spontaneous coalescence of phospholipids

Question 2

The practice of using bacteria to remove pollutants from the environment is called ________.

Accepted Answer

A)  nitrogen fixation 
B)  bioremediaton 
C)  bioelimination 
D)  transduction 
A)  nitrogen fixation 
B)  bioremediaton 
C)  bioelimination 
D)  transduction

Question 3

Which organisms are called extremophiles and flourish mostly in extreme conditions?

Accepted Answer

A)  Protozoans 
B)  Archaea 
C)  Bacteria 
D)  Fungi 
A)  Protozoans 
B)  Archaea 
C)  Bacteria 
D)  Fungi

Question 4

Describe all the possible forms of nucleic acids found in viruses.

Accepted Answer

Single-stranded DNA,

Question 5

Bacteria reproduce asexually via binary fission.This process generates ________.

Accepted Answer

A)  Genetically different bacteria 
B)  Genetically identical bacteria 
A)  Genetically different bacteria 
B)  Genetically identical bacteria

Question 6

What does the term biogenesis mean?

Accepted Answer

A)  Formation of life from other sources of life 
B)  Formation of life from nonliving materials 
C)  Formation of polymers from organic monomers 
D)  Formation of self-replicating molecules 
A)  Formation of life from other sources of life 
B)  Formation of life from nonliving materials 
C)  Formation of polymers from organic monomers 
D)  Formation of self-replicating molecules

Question 7

Bacteria that have a spherical shape are called ________.

Accepted Answer

A)  coccus 
B)  bacillus 
C)  spirillum 
D)  spheroid 
A)  coccus 
B)  bacillus 
C)  spirillum 
D)  spheroid

Question 8

Why is there no cure for prion-related diseases?

Accepted Answer

The misfolded protein is not recognized

Question 9

Which specific cells are infected by the HIV virus?

Accepted Answer

A)  Killer B cells 
B)  Helper T cells 
C)  Red blood cells 
D)  NK cells 
A)  Killer B cells 
B)  Helper T cells 
C)  Red blood cells 
D)  NK cells

Question 10

Which viral life cycle would result in a quicker death for an infected cell?

Accepted Answer

A)  Lytic cycle 
B)  Prophage cycle 
C)  Retroviral cycle 
D)  Lysogenic cycle 
A)  Lytic cycle 
B)  Prophage cycle 
C)  Retroviral cycle 
D)  Lysogenic cycle

Question 11

Which protective structure forms to protect certain bacteria during periods of harsh conditions?

Accepted Answer

A)  Flagella 
B)  Biofilm 
C)  Endospore 
D)  Capsule 
A)  Flagella 
B)  Biofilm 
C)  Endospore 
D)  Capsule

Question 12

If you looked at unknown cells under a microscope,what could lead you to correctly conclude that they are prokaryotic cells?

Accepted Answer

A)  They appear to have a cell wall. 
B)  They lack a nucleus. 
C)  They are oblong in shape. 
D)  They form a colony. 
A)  They appear to have a cell wall. 
B)  They lack a nucleus. 
C)  They are oblong in shape. 
D)  They form a colony.

Question 13

What might be the advantage to a cell if it assimilated a photosynthetic bacterium rather than digesting it?

Accepted Answer

A)  It could now utilize hydrogen sulfide as an energy source. 
B)  It could now use sunlight to make its food. 
C)  It could now live in an oxygen-free environment. 
D)  It could now use glucose as an energy source. 
A)  It could now utilize hydrogen sulfide as an energy source. 
B)  It could now use sunlight to make its food. 
C)  It could now live in an oxygen-free environment. 
D)  It could now use glucose as an energy source.

Question 14

What are the steps toward multicellularity,in the correct order?

Accepted Answer

A)  Some cells become gametes, then a colony forms, and finally some cells start to specialize. 
B)  First a colony of protists forms, then some become gametes, and finally others specialize in various tasks. 
C)  Some protists start to specialize for specific tasks, then they form a colony with specialists, and finally some specialists become gametes. 
D)  First a colony of protists forms, then some protists start to specialize in specific tasks, and finally some cells become gametes. 
A)  Some cells become gametes, then a colony forms, and finally some cells start to specialize. 
B)  First a colony of protists forms, then some become gametes, and finally others specialize in various tasks. 
C)  Some protists start to specialize for specific tasks, then they form a colony with specialists, and finally some specialists become gametes. 
D)  First a colony of protists forms, then some protists start to specialize in specific tasks, and finally some cells become gametes.

Question 15

Food poisoning is often caused by a bacterium called ________.

Accepted Answer

A)  Salmonella 
B)  Staph 
C)  MRSA 
D)  Bacillus anthracis 
A)  Salmonella 
B)  Staph 
C)  MRSA 
D)  Bacillus anthracis

Question 16

A degenerative brain disorder transmitted by cannibalism is called ________.

Accepted Answer

A)  kuru 
B)  scrapie 
C)  Creutzfeldt-Jakob disease 
D)  herpes 
A)  kuru 
B)  scrapie 
C)  Creutzfeldt-Jakob disease 
D)  herpes

Question 17

How does azidothymidine (AZT)fight AIDS?

Accepted Answer

A)  It blocks the virus from entering the cell. 
B)  It targets the virus for destruction. 
C)  It blocks the enzyme that converts viral RNA to DNA. 
D)  It blocks the enzyme that assembles all of the parts into new viruses. 
A)  It blocks the virus from entering the cell. 
B)  It targets the virus for destruction. 
C)  It blocks the enzyme that converts viral RNA to DNA. 
D)  It blocks the enzyme that assembles all of the parts into new viruses.

Question 18

The main hypothesis about the origin of the first living organisms is called ________.

Accepted Answer

A)  chemo-evolution 
B)  novel design 
C)  biogenesis 
D)  cytosynthesis 
A)  chemo-evolution 
B)  novel design 
C)  biogenesis 
D)  cytosynthesis

Question 19

Where would you find the double-stranded HIV DNA in an infected cell?

Accepted Answer

A)  Incorporated directly into the host cell's chromosome 
B)  As a separate plasmid in the host cell's nucleus 
C)  In a vesicle in the cytoplasm 
D)  There is no HIV form of DNA. It exists only as RNA, which makes viral proteins directly. 
A)  Incorporated directly into the host cell's chromosome 
B)  As a separate plasmid in the host cell's nucleus 
C)  In a vesicle in the cytoplasm 
D)  There is no HIV form of DNA. It exists only as RNA, which makes viral proteins directly.

Question 20

Nitrogen-fixing bacteria convert atmospheric nitrogen (N₂ gas)into ammonium (NH₄).Why is this conversion important for life on Earth?

Accepted Answer

A)  Ammonium is an important cleaning agent. 
B)  Nitrogen gas is toxic. 
C)  Ammonium is a very important plant nutrient. 
D)  Nitrogen gas leads to global warming. 
A)  Ammonium is an important cleaning agent. 
B)  Nitrogen gas is toxic. 
C)  Ammonium is a very important plant nutrient. 
D)  Nitrogen gas leads to global warming.

What is the leading scientific hypothesis explaining how the endomembrane system of eukaryotic cells originated?

The practice of using bacteria to remove pollutants from the environment is called ________.

Which organisms are called extremophiles and flourish mostly in extreme conditions?

Describe all the possible forms of nucleic acids found in viruses.

Bacteria reproduce asexually via binary fission.This process generates ________.

What does the term biogenesis mean?

Bacteria that have a spherical shape are called ________.

Why is there no cure for prion-related diseases?

Which specific cells are infected by the HIV virus?

Which viral life cycle would result in a quicker death for an infected cell?

Which protective structure forms to protect certain bacteria during periods of harsh conditions?

If you looked at unknown cells under a microscope,what could lead you to correctly conclude that they are prokaryotic cells?

What might be the advantage to a cell if it assimilated a photosynthetic bacterium rather than digesting it?

What are the steps toward multicellularity,in the correct order?

Food poisoning is often caused by a bacterium called ________.

A degenerative brain disorder transmitted by cannibalism is called ________.

How does azidothymidine (AZT)fight AIDS?

The main hypothesis about the origin of the first living organisms is called ________.

Where would you find the double-stranded HIV DNA in an infected cell?

Nitrogen-fixing bacteria convert atmospheric nitrogen (N₂ gas)into ammonium (NH₄).Why is this conversion important for life on Earth?

An Introduction to the Science of Life

The Chemistry of Life

The Cell: The Fundamental Unit of Life

Energy and Life

Chromosomes and Inheritance

Dna: the Molecule of Life

Darwinian Evolution

Biodiversity 2: Fungi and Plants

Biodiversity 3: Animals

Human Body Systems

Ecology

Filters

Exam 8: Biodiversity 1: Microscopic Organisms

What is the leading scientific hypothesis explaining how the endomembrane system of eukaryotic cells originated?

The practice of using bacteria to remove pollutants from the environment is called ________.

Which organisms are called extremophiles and flourish mostly in extreme conditions?

Describe all the possible forms of nucleic acids found in viruses.

Bacteria reproduce asexually via binary fission.This process generates ________.

What does the term biogenesis mean?

Bacteria that have a spherical shape are called ________.

Why is there no cure for prion-related diseases?

Which specific cells are infected by the HIV virus?

Which viral life cycle would result in a quicker death for an infected cell?

Which protective structure forms to protect certain bacteria during periods of harsh conditions?

If you looked at unknown cells under a microscope,what could lead you to correctly conclude that they are prokaryotic cells?

What might be the advantage to a cell if it assimilated a photosynthetic bacterium rather than digesting it?

What are the steps toward multicellularity,in the correct order?

Food poisoning is often caused by a bacterium called ________.

A degenerative brain disorder transmitted by cannibalism is called ________.

How does azidothymidine (AZT)fight AIDS?

The main hypothesis about the origin of the first living organisms is called ________.

Where would you find the double-stranded HIV DNA in an infected cell?

Nitrogen-fixing bacteria convert atmospheric nitrogen (N₂ gas)into ammonium (NH₄).Why is this conversion important for life on Earth?

An Introduction to the Science of Life

The Chemistry of Life

The Cell: The Fundamental Unit of Life

Energy and Life

Chromosomes and Inheritance

Dna: the Molecule of Life

Darwinian Evolution

Biodiversity 2: Fungi and Plants

Biodiversity 3: Animals

Human Body Systems

Ecology

Filters