Question 1

A __________ is a polysaccharide layer that lies outside the cell wall and is not easily removed.

Accepted Answer

capsule

Question 2

_______ bind ferric iron and transport it into a bacterial cell.

Accepted Answer

Siderophores

Question 3

A branched network of hyphae formed by the Actinomycetes is called a __________.

Accepted Answer

mycelium

Question 4

A __________ layer consists of diffuse unorganized polysaccharide material that lies outside the cell wall and is easily removed.

Accepted Answer

The answer of A __________ layer consists of diffuse unorganized...

Question 5

The genus of bacteria that undergoes cell division in random planes,forming grapelike clusters of round bacteria,are the __________.
or

Accepted Answer

The answer of The genus of bacteria that undergoes cell...

Question 6

Sterol-like molecules called hopanoids are thought to be important for the structural integrity of many bacteria because of their suspected role in membrane stabilization.

Accepted Answer

Hopanoids have been shown to play a role in membrane stabilization in many bacteria, which is important for their structural integrity.

Question 7

You discover a new transport system used by a newly discovered bacterial species.The sugars that are transported using this system are phosphorylated as they enter the bacterial cell.You would describe this transport system as a(n)_____.

Accepted Answer

Group translocation is a type of transport system that modifies the transported molecules while they are being transported across the cell membrane. In this case, the sugars are being phosphorylated as they enter the bacterial cell, which is a characteristic feature of group translocation. Facilitated diffusion, passive diffusion, and micronutrient regulation do not involve modification of the transported molecules during transport.

Question 8

Prokaryotes were once described based on structures that were present in eukaryotes,but absent in prokaryotes.

Accepted Answer

Prokaryotes were initially described based on the absence of membrane-bound organelles, including nuclei, mitochondria, chloroplasts, and endoplasmic reticulum, which are present in eukaryotic cells. However, it is now known that prokaryotes have their unique structures, such as cell walls, capsules, and flagella, which are absent in eukaryotic cells.

Question 9

Bacteria that do not have a fixed shape are said to be __________.

Accepted Answer

The answer of Bacteria that do not have a fixed...

Question 10

The cell membrane is a rigid structure that provides bacteria with their characteristic shapes.

Accepted Answer

The cell membrane of bacteria is not rigid but rather flexible and fluid. It is composed of phospholipids and proteins arranged in a bilayer, which allows for the movement of molecules into and out of the cell.

Question 11

Growth factors cannot by synthesized by the bacteria that use them and include amino acids,pyrimidines,and vitamins.

Accepted Answer

Growth factors are essential nutrients that bacteria require for growth and cannot synthesize on their own. Amino acids, pyrimidines, and vitamins are examples of growth factors that must be obtained from the environment.

Question 12

Enzymes that are secreted out of the cell to aid in the acquisition and digestion of environmental nutrients are called __________.

Accepted Answer

The answer of Enzymes that are secreted out of the...

Question 13

When the cell wall is removed from a Gram-negative bacterium without removing the outer membrane,the resulting form is called a(n)__________.

Accepted Answer

The answer of When the cell wall is removed from...

Question 14

Molecules or regions of molecules that readily interact with water are said to be __________,whereas molecules or regions of molecules that are insoluble in water or do not readily interact with water are said to be hydrophobic.

Accepted Answer

The answer of Molecules or regions of molecules that readily...

Question 15

Gram-positive bacteria have a thinner layer of peptidoglycan than gram-negative bacteria.

Accepted Answer

Gram-positive bacteria have a thicker layer of peptidoglycan than gram-negative bacteria.

Question 16

Actinomycetes form long filaments called ___________.

Accepted Answer

The answer of Actinomycetes form long filaments called ___________....

Question 17

Predict how the plasma membrane fatty acid composition would change as the temperature of the habitat of an aquatic bacterial species warms from 2^oC to 15^oC during the spring and summer months.

Accepted Answer

As temperature increases, bacteria often increase the percentage of saturated fatty acids in their membranes to maintain membrane stability and fluidity.

Question 18

Nutrients that are used by bacteria in relatively large amounts are _______________.

Accepted Answer

The answer of Nutrients that are used by bacteria in...

Question 19

Bacteria growing at lower temperatures have more saturated fatty acids in their membranes.

Accepted Answer

Bacteria growing at lower temperatures tend to have more unsaturated fatty acids in their membranes to maintain membrane fluidity.

Question 20

Gram-positive bacteria have a structurally and chemically more complex cell wall than gram-negative bacteria.

Accepted Answer

Gram-negative bacteria have a more complex cell wall structure, characterized by an outer membrane containing lipopolysaccharides, in addition to a thin peptidoglycan layer, unlike gram-positive bacteria which have a thicker peptidoglycan layer but lack the outer membrane.

Quiz 3: Bacterial Cell Structure

A __________ is a polysaccharide layer that lies outside the cell wall and is not easily removed.

_______ bind ferric iron and transport it into a bacterial cell.

A branched network of hyphae formed by the Actinomycetes is called a __________.

A __________ layer consists of diffuse unorganized polysaccharide material that lies outside the cell wall and is easily removed.

The genus of bacteria that undergoes cell division in random planes,forming grapelike clusters of round bacteria,are the __________. or

Sterol-like molecules called hopanoids are thought to be important for the structural integrity of many bacteria because of their suspected role in membrane stabilization.

You discover a new transport system used by a newly discovered bacterial species.The sugars that are transported using this system are phosphorylated as they enter the bacterial cell.You would describe this transport system as a(n) _____.

Prokaryotes were once described based on structures that were present in eukaryotes,but absent in prokaryotes.

Bacteria that do not have a fixed shape are said to be __________.

The cell membrane is a rigid structure that provides bacteria with their characteristic shapes.

Growth factors cannot by synthesized by the bacteria that use them and include amino acids,pyrimidines,and vitamins.

Enzymes that are secreted out of the cell to aid in the acquisition and digestion of environmental nutrients are called __________.

When the cell wall is removed from a Gram-negative bacterium without removing the outer membrane,the resulting form is called a(n)__________.

Molecules or regions of molecules that readily interact with water are said to be __________,whereas molecules or regions of molecules that are insoluble in water or do not readily interact with water are said to be hydrophobic.

Gram-positive bacteria have a thinner layer of peptidoglycan than gram-negative bacteria.

Actinomycetes form long filaments called ___________.

Predict how the plasma membrane fatty acid composition would change as the temperature of the habitat of an aquatic bacterial species warms from 2^oC to 15^oC during the spring and summer months.

Nutrients that are used by bacteria in relatively large amounts are _______________.

Bacteria growing at lower temperatures have more saturated fatty acids in their membranes.

Gram-positive bacteria have a structurally and chemically more complex cell wall than gram-negative bacteria.

Quiz 3: Bacterial Cell Structure

A __________ is a polysaccharide layer that lies outside the cell wall and is not easily removed.

_______ bind ferric iron and transport it into a bacterial cell.

A branched network of hyphae formed by the Actinomycetes is called a __________.

A __________ layer consists of diffuse unorganized polysaccharide material that lies outside the cell wall and is easily removed.

The genus of bacteria that undergoes cell division in random planes,forming grapelike clusters of round bacteria,are the __________. or

Sterol-like molecules called hopanoids are thought to be important for the structural integrity of many bacteria because of their suspected role in membrane stabilization.

You discover a new transport system used by a newly discovered bacterial species.The sugars that are transported using this system are phosphorylated as they enter the bacterial cell.You would describe this transport system as a(n) _____.

Prokaryotes were once described based on structures that were present in eukaryotes,but absent in prokaryotes.

Bacteria that do not have a fixed shape are said to be __________.

The cell membrane is a rigid structure that provides bacteria with their characteristic shapes.

Growth factors cannot by synthesized by the bacteria that use them and include amino acids,pyrimidines,and vitamins.

Enzymes that are secreted out of the cell to aid in the acquisition and digestion of environmental nutrients are called __________.

When the cell wall is removed from a Gram-negative bacterium without removing the outer membrane,the resulting form is called a(n)__________.

Molecules or regions of molecules that readily interact with water are said to be __________,whereas molecules or regions of molecules that are insoluble in water or do not readily interact with water are said to be hydrophobic.

Gram-positive bacteria have a thinner layer of peptidoglycan than gram-negative bacteria.

Actinomycetes form long filaments called ___________.

Predict how the plasma membrane fatty acid composition would change as the temperature of the habitat of an aquatic bacterial species warms from 2oC to 15oC during the spring and summer months.

Nutrients that are used by bacteria in relatively large amounts are _______________.

Bacteria growing at lower temperatures have more saturated fatty acids in their membranes.

Gram-positive bacteria have a structurally and chemically more complex cell wall than gram-negative bacteria.

Predict how the plasma membrane fatty acid composition would change as the temperature of the habitat of an aquatic bacterial species warms from 2^oC to 15^oC during the spring and summer months.