ACELLULAR LIFE – BIOLOGY Exam
(2024) || Questions & 100% Correct Answers
What does the coat of the virion consist of? - ANSWER - It consists of a capsid and an
envelope.
What are capsomeres and how many are found in herpes and adenovirus? - ANSWER
- Capsomeres are the identical repeating subunits that form the capsid. Herpes has 162
capsomeres, adenovirus has 252.
What are the two forms of symmetry in virus capsid? - ANSWER - 1. Icosehedral 2.
Helical
What is isosahedral symmetry in capsids? - ANSWER - It is when capsomeres are
arranged in the form of 20 triangles.
What is a helical symmetry in the capsid - ANSWER - It is when capsomeres are
arranged in a hollow coil that appears rod shaped.
What is the structure of the envelope surrounding the capsid? - ANSWER - 1. Made of
lipoprotein.
2. Derived from the cell surface membrane of the host
3. Contains virally encoded proteins.
4. Covered with glycoproteins spikes to help them recognize host cells.
What are the different types of viruses, based upon their host? - ANSWER - 1.
Bacteriophage virus
2. Plant viruses
3. Animal viruses
Tell me about Bacteriopages, bitch - ANSWER - 1. Attacks Bacteria
2. DNA virus with a polyhedral head and a tail
Plant viruses, tell me more - ANSWER - There are more than 2000 viral plant diseases.
1. Many have rod shaped capsids like TMV eg. Potato yellow dwarf virus.
Animal viruses, tell me examples and their behaviour - ANSWER - 1. Rous Sarcoma
causes cancer in animals
2. Papovirus causes warts
3. Poxivirus causes small pox
4. Picornovirus causes polio, Hepatitis A
5. Paramyxovirus causes measles, mumps
Viruses attack and destroy cells in the human body to cause diseases.
, Tell me the different types of viruses based on their capsid - ANSWER - 1. Helical
2. Polyhedral
3. Enveloped
4. Complex
Example of helical capsid? - ANSWER - tobacco mosaic virus
Example of polyhedral capsid? - ANSWER - Adenovirus
Example of enveloped virus? - ANSWER - influenza virus
Example of complex capsid? - ANSWER - Bacteriophage
The different types of viruses based on their genomes ? - ANSWER - 1. Double
stranded DNA (dsDNA)
2. Single stranded DNA (ssDNA)
3. Double stranded RNA (dsRNA)
4. Single-stranded RNA (ssRNA); serves as mRNA
5. +ssRNA; template for mRNA synthesis like influenza virus
6. -ssRNA; template for DNA synthesis like HIV
Example of double stranded DNA virus - ANSWER - Poxivirus eg. Smallpox virus
Example of single stranded DNA virus - ANSWER - Parvovirus eg. Mild rash virus
Example of Double stranded RNA virus? - ANSWER - Reovirus eg. Diarrhea virus
Example of single stranded RNA virus (the one that serves as mRNA) ? - ANSWER -
Togavirus eg. Rubella virus
Properties of viruses - ANSWER - Can't independently replicate, can't be seen through
light microscope, can't synthesize own energy.
Viruses can pass through - ANSWER - Porecalein filter paper.
Living characteristics of viruses are - ANSWER - 1. Own genetic material (Single or
double Stranded DNA/RNA), 2. Reproduce using host cell metabolism machinery. 3.
Causes disease. 4. Destroyed by UV rays (or heat)
Non-Living characteristics of virus - ANSWER - 1. Can be crystallized. 2. Lack cellular
structure and enzyme activity. 3. Don't respire.
Structure of enzyme - ANSWER - 1. Core has Proteins (enzyme) and genome
(DNA/RNA)
2. Coat has protein coat called Capsid and some have Lipoprotein Envelope
(2024) || Questions & 100% Correct Answers
What does the coat of the virion consist of? - ANSWER - It consists of a capsid and an
envelope.
What are capsomeres and how many are found in herpes and adenovirus? - ANSWER
- Capsomeres are the identical repeating subunits that form the capsid. Herpes has 162
capsomeres, adenovirus has 252.
What are the two forms of symmetry in virus capsid? - ANSWER - 1. Icosehedral 2.
Helical
What is isosahedral symmetry in capsids? - ANSWER - It is when capsomeres are
arranged in the form of 20 triangles.
What is a helical symmetry in the capsid - ANSWER - It is when capsomeres are
arranged in a hollow coil that appears rod shaped.
What is the structure of the envelope surrounding the capsid? - ANSWER - 1. Made of
lipoprotein.
2. Derived from the cell surface membrane of the host
3. Contains virally encoded proteins.
4. Covered with glycoproteins spikes to help them recognize host cells.
What are the different types of viruses, based upon their host? - ANSWER - 1.
Bacteriophage virus
2. Plant viruses
3. Animal viruses
Tell me about Bacteriopages, bitch - ANSWER - 1. Attacks Bacteria
2. DNA virus with a polyhedral head and a tail
Plant viruses, tell me more - ANSWER - There are more than 2000 viral plant diseases.
1. Many have rod shaped capsids like TMV eg. Potato yellow dwarf virus.
Animal viruses, tell me examples and their behaviour - ANSWER - 1. Rous Sarcoma
causes cancer in animals
2. Papovirus causes warts
3. Poxivirus causes small pox
4. Picornovirus causes polio, Hepatitis A
5. Paramyxovirus causes measles, mumps
Viruses attack and destroy cells in the human body to cause diseases.
, Tell me the different types of viruses based on their capsid - ANSWER - 1. Helical
2. Polyhedral
3. Enveloped
4. Complex
Example of helical capsid? - ANSWER - tobacco mosaic virus
Example of polyhedral capsid? - ANSWER - Adenovirus
Example of enveloped virus? - ANSWER - influenza virus
Example of complex capsid? - ANSWER - Bacteriophage
The different types of viruses based on their genomes ? - ANSWER - 1. Double
stranded DNA (dsDNA)
2. Single stranded DNA (ssDNA)
3. Double stranded RNA (dsRNA)
4. Single-stranded RNA (ssRNA); serves as mRNA
5. +ssRNA; template for mRNA synthesis like influenza virus
6. -ssRNA; template for DNA synthesis like HIV
Example of double stranded DNA virus - ANSWER - Poxivirus eg. Smallpox virus
Example of single stranded DNA virus - ANSWER - Parvovirus eg. Mild rash virus
Example of Double stranded RNA virus? - ANSWER - Reovirus eg. Diarrhea virus
Example of single stranded RNA virus (the one that serves as mRNA) ? - ANSWER -
Togavirus eg. Rubella virus
Properties of viruses - ANSWER - Can't independently replicate, can't be seen through
light microscope, can't synthesize own energy.
Viruses can pass through - ANSWER - Porecalein filter paper.
Living characteristics of viruses are - ANSWER - 1. Own genetic material (Single or
double Stranded DNA/RNA), 2. Reproduce using host cell metabolism machinery. 3.
Causes disease. 4. Destroyed by UV rays (or heat)
Non-Living characteristics of virus - ANSWER - 1. Can be crystallized. 2. Lack cellular
structure and enzyme activity. 3. Don't respire.
Structure of enzyme - ANSWER - 1. Core has Proteins (enzyme) and genome
(DNA/RNA)
2. Coat has protein coat called Capsid and some have Lipoprotein Envelope
