Bio 1002 Ch 20

Jul 10th, 2023

4.7 (114 reviews)

35 test answers

question

What is a major difference between the domains, Bacteria and Archaea?

answer

peptidoglycan in the cell wall of bacteria but not the archaea

question

The rapid and inexpensive routine laboratory procedure used to classify the bacterial world into two major groups is called the __________.

answer

Gram stain

question

Which of the following statements best describes the end result of bacterial conjugation?

answer

One cell has given a copy of a plasmid to another cell and kept one copy for itself.

question

From which cell does the sex pilus originate during bacterial conjugation?

answer

the donor cell

question

True or False. During bacterial conjugation, the recipient cell receives a single-stranded loop of DNA.

answer

true

question

Which structure helps bacteria to attach within the tissues that they will infect?

answer

the capsule:The gelatinous capsule that covers some bacteria helps them attach to the tissues that they will infect.

question

True or false. Bacteria reproduce by an asexual process in which one parent cell gives rise to identical daughter cells

answer

True:Bacteria reproduce by binary fission, which is an asexual process in which one parent cell splits in two to give rise to identical daughter cells.

question

There are four bacteria in an egg salad that is left out at room temperature. After two hours, how many bacteria will be in the egg salad?

answer

256:The bacteria would double 6 times in 2 hours, so the total number of bacteria in the egg salad would be 256.

question

Why do virologists consider viruses to be nonliving?

answer

They are not cells nor are they composed of cells, the basic components of life. : Unlike cells, they have no mechanisms to reproduce themselves without entering a cell.

question

Bacterial cell walls contain ________, which makes them different from other organisms.

answer

peptidoglycan

question

While examining a hot spring, you find something you haven't seen before. It has a cell membrane, but the cell wall lacks peptidoglycan. It contains both DNA and RNA. The DNA is circular. It would be classified as a(n)

answer

archaea.

question

What differentiates gram-positive bacteria from gram-negative bacteria?

answer

the way the cell stains

question

Some archaea can live in boiling water. True or False?

answer

true

question

Bacterial endospores are used for

answer

keeping the cell alive in harsh conditions

question

What do the sticky layers of protective slime produced by some bacteria enable them to do?

answer

stick together and form biofilms

question

Sex pili are prokaryotic structures that are used

answer

during conjunction

question

Cyanobacteria obtain energy from

answer

sunlight

question

In bacteria, the small, circular pieces of DNA that are located outside the chromosome are called

answer

plasmids

question

Mutations that improve the survival and reproduction of organisms, and thus contribute to the evolution of species, arise rapidly in prokaryotes due to their

answer

rapid rate of cell division

question

True or False: Organisms that produce disease are pathogens.

answer

True

question

Legumes obtain a useful form of ________ from bacteria that live in root nodules.

answer

nitrogen

question

You discover a new particle. It has only RNA as a nucleic acid and lacks both a membrane and cytoplasm. This particle is a(n)

answer

Virus

question

Prions are made up of only protein. True or False?

answer

True

question

Viroids

answer

are infectious pieces of RNA

question

Bovine spongiform encephalopathy, or mad cow disease, is caused by a

answer

Piron

question

What consist of a protein coat surrounding a molecule of genetic material?

answer

virus

question

A virus basically consists of

answer

RNA or DNA and a protein coat.

question

In the process known as_______ ______, a single bacterium divides in half, producing two identical offspring.

answer

Binary Fission

question

When some bacteria are exposed to harsh conditions, they produce _________ , thick-coated protective structures that form within the bacterial cell.

answer

endospores

question

_______ is the use of organisms to remove or detoxify toxic substances in the environment.

answer

Bioremediation

question

In prokaryotes, ___ is the transfer of DNA from one cell to another via temporary connection.

answer

conjunction

question

_______ are organisms that can live and grow in the absence of oxygen.

answer

Anaerobes

question

Dental plaque is one example of a(n)______ , a colony of different prokaryote species that secrete slime that sticks the cells to a substrate and to each other.

answer

biofilm

question

______ are viruses that only infect bacteria.

answer

Bacteriophages

question

The general term for organisms that are capable of producing disease is ______

answer

Pathogens

1 of 35

question

What is a major difference between the domains, Bacteria and Archaea?

answer

peptidoglycan in the cell wall of bacteria but not the archaea

question

The rapid and inexpensive routine laboratory procedure used to classify the bacterial world into two major groups is called the __________.

answer

Gram stain

question

Which of the following statements best describes the end result of bacterial conjugation?

answer

One cell has given a copy of a plasmid to another cell and kept one copy for itself.

question

From which cell does the sex pilus originate during bacterial conjugation?

answer

the donor cell

Don’t waste time

You can get a custom paper by one of our expert writers.

Get your custom essay

Helping students since 2015

question

True or False. During bacterial conjugation, the recipient cell receives a single-stranded loop of DNA.

answer

true

question

Which structure helps bacteria to attach within the tissues that they will infect?

answer

the capsule:The gelatinous capsule that covers some bacteria helps them attach to the tissues that they will infect.

question

True or false. Bacteria reproduce by an asexual process in which one parent cell gives rise to identical daughter cells

answer

True:Bacteria reproduce by binary fission, which is an asexual process in which one parent cell splits in two to give rise to identical daughter cells.

question

There are four bacteria in an egg salad that is left out at room temperature. After two hours, how many bacteria will be in the egg salad?

answer

256:The bacteria would double 6 times in 2 hours, so the total number of bacteria in the egg salad would be 256.

question

Why do virologists consider viruses to be nonliving?

answer

They are not cells nor are they composed of cells, the basic components of life. : Unlike cells, they have no mechanisms to reproduce themselves without entering a cell.

question

Bacterial cell walls contain ________, which makes them different from other organisms.

answer

peptidoglycan

question

answer

archaea.

question

What differentiates gram-positive bacteria from gram-negative bacteria?

answer

the way the cell stains

question

Some archaea can live in boiling water. True or False?

answer

true

question

Bacterial endospores are used for

answer

keeping the cell alive in harsh conditions

question

What do the sticky layers of protective slime produced by some bacteria enable them to do?

answer

stick together and form biofilms

question

Sex pili are prokaryotic structures that are used

answer

during conjunction

question

Cyanobacteria obtain energy from

answer

sunlight

question

In bacteria, the small, circular pieces of DNA that are located outside the chromosome are called

answer

plasmids

question

Mutations that improve the survival and reproduction of organisms, and thus contribute to the evolution of species, arise rapidly in prokaryotes due to their

answer

rapid rate of cell division

question

True or False: Organisms that produce disease are pathogens.

answer

True

question

Legumes obtain a useful form of ________ from bacteria that live in root nodules.

answer

nitrogen

question

You discover a new particle. It has only RNA as a nucleic acid and lacks both a membrane and cytoplasm. This particle is a(n)

answer

Virus

question

Prions are made up of only protein. True or False?

answer

True

question

Viroids

answer

are infectious pieces of RNA

question

Bovine spongiform encephalopathy, or mad cow disease, is caused by a

answer

Piron

question

What consist of a protein coat surrounding a molecule of genetic material?

answer

virus

question

A virus basically consists of

answer

RNA or DNA and a protein coat.

question

In the process known as_______ ______, a single bacterium divides in half, producing two identical offspring.

answer

Binary Fission

question

When some bacteria are exposed to harsh conditions, they produce _________ , thick-coated protective structures that form within the bacterial cell.

answer

endospores

question

_______ is the use of organisms to remove or detoxify toxic substances in the environment.

answer

Bioremediation

question

In prokaryotes, ___ is the transfer of DNA from one cell to another via temporary connection.

answer

conjunction

question

_______ are organisms that can live and grow in the absence of oxygen.

answer

Anaerobes

question

Dental plaque is one example of a(n)______ , a colony of different prokaryote species that secrete slime that sticks the cells to a substrate and to each other.

answer

biofilm

question

______ are viruses that only infect bacteria.

answer

Bacteriophages

question

The general term for organisms that are capable of producing disease is ______

answer

Pathogens

Bio 1002 Ch 20

Haven't found what you need?