Viruses

Q.

What are the steps of the lytic cycle?

Q.

What is the lytic cycle of bacteriophage?

Q.

What are envelopes in viruses?

Q. Viruses are no more "alive" than isolated chromosomes because :

1. They require both RNA and DNA
2. They both need food molecules
3. They both require oxygen for respiration
4. Both require the environment of a cell to replicate

Q. COVID-19 is caused by

1. virus
2. viroid
3. prion
4. bacteria

Q. The genetic material that is present in viruses is

1. only DNA
2. only RNA
3. both DNA and RNA
4. either RNA or DNA

Q. Viruses grow

1. only inside plant cell
2. only inside animal cell
3. only inside bacterial cell
4. inside any living cell

Q.

What happens in the vegetative stage of the lytic life cycle?

Q. M.W. Beijerinck used the term ‘Contagium vivum fluidum’ to describe

1. prions
2. viruses
3. viroids
4. bacteria

Q.

Which one of the following is not eukaryotic?

1. Protista

2. Monera

3. Plantae

4. Animalia

Q. The virus envelope is also known as _____.

1. Core
2. Nucleoprotein
3. Virion
4. Capsid

Q. Viruses are no more "alive" than isolated chromosomes because :

1. They require both RNA and DNA
2. They both need food molecules
3. They both require oxygen for respiration
4. Both require the environment of a cell to replicate

Q. Of the following diseases given below, how many of them are caused by viruses?
Mumps, Smallpox, Herpes, Citrus canker, Red rot of sugarcane, Tobacco mosaic

1. Six
2. Four
3. Five
4. Two

Q.

Viruses are

1. intracellular obligate parasites

2. extracellular saprophytes

3. facultative parasites

4. intracellular symbionts

Q. Interferons are synthesized in response

1. Mycoplasma
2. Bacteria
3. Viruses
4. Fungi

Q. The virus envelope is also known as _____.

1. Core
2. Nucleoprotein
3. Virion
4. Capsid

Q. Which of the following statements regarding HIV and its entry into target cells are correct?
A. The initial binding event occurs between viral Gp120 and CD4 receptors.
B. It belongs to the genus Flavivirus.
C. Virus entry proceeds through fusion of the viral envelope with the target cell membrane.
D. Only reverse transcriptase gains entry inside the target cell.

1. A and B
2. B and C
3. A and C
4. C and D

Q. Virus was called infectious living fluid by

1. Louis Pasteur
2. D.J. Ivanowsky
3. Beijerinek
4. Stanley

Q. COVID-19 is caused by

1. virus
2. viroid
3. prion
4. bacteria

Q. Viruses grow

1. only inside plant cell
2. only inside animal cell
3. only inside bacterial cell
4. inside any living cell