Question 1

A capsomere is

Accepted Answer

A capsomere is a protein subunit that makes up the capsid, the protein shell that surrounds the nucleic acid in a virus. Each capsomere may be identical or slightly different in composition, but they all work together to form the overall structure of the capsid.

Question 2

Enveloped viral structure
Use the figure below to answer the following questions.
 
-In the figure which letter (A-D)indicates the RNA or DNA?

Accepted Answer

D

Question 3

A virion is

Accepted Answer

C

Question 4

Enveloped viral structure
Use the figure below to answer the following questions.
 
-In the figure which letter (A-D)indicates the part that will eventually fuse with the host cell plasma membrane?

Accepted Answer

The answer of Enveloped viral structure
Use the figure below to...

Question 5

How does a simple icosahedral virus differ from a complex icosahedral virus?

Accepted Answer

The answer of How does a simple icosahedral virus differ...

Question 6

A capsid is

Accepted Answer

A capsid is a protective protein shell that surrounds the nucleic acid of a virus. It is not the complete viral particle, as it does not include other components such as enzymes or lipid membranes. A and D are both correct statements, but A is a more comprehensive answer.

Question 7

What is the composition of viruses?

Accepted Answer

Viruses are composed of genetic material (usually either DNA or RNA) surrounded by a protein coat (called a capsid). Some viruses may also have additional layers of lipids or carbohydrates around the capsid. The genetic material is what allows the virus to replicate within a host cell, while the protein coat protects the genetic material and facilitates attachment to host cells.

Question 8

Explain the difference between helical and icosahedral symmetry.Provide an example of each.

Accepted Answer

The answer of Explain the difference between helical and icosahedral...

Question 9

Enveloped viral structure
Use the figure below to answer the following questions.
 
-In the figure which letter (A-D)indicates neuraminidase or hemagglutinin?

Accepted Answer

The answer of Enveloped viral structure
Use the figure below to...

Question 10

Reverse transcriptase is a(n)

Accepted Answer

Reverse transcriptase is a type of RNA-dependent DNA polymerase which synthesizes a single-stranded DNA molecule complementary to the RNA template. Therefore, the best choice is B, RNA-dependent DNA polymerase.

Question 11

Reverse transcriptase is an enzyme that

Accepted Answer

Reverse transcriptase is a virally encoded enzyme that is carried within retroviruses, allowing them to transcribe their RNA genome into DNA upon infection of a host cell. This DNA can then integrate into the host genome, allowing the virus to persist long-term.

Question 12

The _____ is the protein that is located between the capsid and the nucleocapsid of some enveloped viruses.

Accepted Answer

The tegument is a protein layer located between the capsid and the nucleocapsid of some enveloped viruses.

Question 13

A nucleocapsid

Accepted Answer

A nucleocapsid is the combination of the viral nucleic acid and the protein capsid that encases it.

Question 14

Endosomes that assist in the uncoating of non-enveloped viruses function via

Accepted Answer

Endosomes that assist in the uncoating of non-enveloped viruses function via an acidic environment. The low pH of the endosomal lumen denatures the capsid proteins, leading to the release of the viral genome into the cytoplasm.

Question 15

Enveloped viral structure
Use the figure below to answer the following questions.
 
-In the figure which letter (A-D)indicates the matrix protein?

Accepted Answer

The answer of Enveloped viral structure
Use the figure below to...

Question 16

Which of these processes is not used by viruses to spread within a host?

Accepted Answer

The answer of Which of these processes is not used...

Question 17

Regions on the host cell's plasma membrane rich in cholesterol and particular types of fatty acids to which some viruses attach are called

Accepted Answer

Regions on the host cell's plasma membrane rich in cholesterol and particular types of fatty acids to which some viruses attach are called lipid rafts.

Question 18

Retroviruses contain _____ which catalyzes the synthesis of DNA encoded by their RNA.

Accepted Answer

Retroviruses are RNA viruses that can convert their RNA into DNA using the enzyme reverse transcriptase. This DNA can then integrate into the host genome and be transcribed into RNA for viral protein production. RNA polymerase catalyzes the synthesis of RNA from DNA, DNA polymerase catalyzes the synthesis of DNA from nucleotides, RNA transcriptase and RNA replicase are not enzymes commonly found in retroviruses.

Question 19

Why is the capsid an important part of the structure of the virus?

Accepted Answer

The capsid is an important part of the structure of the virus because it allows the virion to withstand harsh environments and is easily shed when it enters the host cell.

Question 20

A viral envelope is

Accepted Answer

A viral envelope is a phospholipid bilayer that contains glycoproteins. It surrounds some viruses and is acquired from the host cell membrane during the process of viral assembly and budding.

Quiz 12: The Structure and Infection Cycle of Viruses

A capsomere is

Enveloped viral structure Use the figure below to answer the following questions. -In the figure which letter (A-D)indicates the RNA or DNA?

A virion is

Enveloped viral structure Use the figure below to answer the following questions. -In the figure which letter (A-D)indicates the part that will eventually fuse with the host cell plasma membrane?

How does a simple icosahedral virus differ from a complex icosahedral virus?

A capsid is

What is the composition of viruses?

Explain the difference between helical and icosahedral symmetry.Provide an example of each.

Enveloped viral structure Use the figure below to answer the following questions. -In the figure which letter (A-D)indicates neuraminidase or hemagglutinin?

Reverse transcriptase is a(n)

Reverse transcriptase is an enzyme that

The _____ is the protein that is located between the capsid and the nucleocapsid of some enveloped viruses.

A nucleocapsid

Endosomes that assist in the uncoating of non-enveloped viruses function via

Enveloped viral structure Use the figure below to answer the following questions. -In the figure which letter (A-D)indicates the matrix protein?

Which of these processes is not used by viruses to spread within a host?

Regions on the host cell's plasma membrane rich in cholesterol and particular types of fatty acids to which some viruses attach are called

Retroviruses contain _____ which catalyzes the synthesis of DNA encoded by their RNA.

Why is the capsid an important part of the structure of the virus?

A viral envelope is