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Biological Classification Test - 27

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Biological Classification Test - 27
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Cleistothecium is present in ______________.
    Solution

    Cleistothecium is actually the spherical fruiting body in penicillium and aspergillus. It is actually the container of the sexual spores called ascospores. Cleistothecia must rupture or disintegrate to release their ascospores. 

    The correct answer is C.

  • Question 2
    1 / -0
    Which of the following is absent in virus?
    Solution
    The virus is completely inert outside its host cell. Inside its host cell, the virus initiates the synthesis of viral proteins and undergo replication. Energy liberation takes place within mitochondria and within the cytoplasm. Virus lack cell organelles, so energy liberation cannot take place in the virus.
  • Question 3
    1 / -0
    Which of the following is the largest virus?
    Solution

    The largest virus is the pox virus, around 250 to 300 microns. The infectious viral particles have the enzymes required for replication within the virion and hence, the virus has a large size. These viruses are different from other viruses in their ability to replicate inside the infected cytoplasm independently. So, the correct answer is option C.

  • Question 4
    1 / -0
    Which of the following is not concerned with the viruses?
    Solution
    Viruses multiply only in living host cell, as they can not multiply outside the living cell and remains as nonliving. Viruses are composed of protein and nucleic acid and they cannot use oxygen for respiration. They can not grow in sugar syrup. As they need necessary proteins for protein synthesis, a copy of the genetic material, which are only available within a cell.
    Therefore, the correct answer is option D.
  • Question 5
    1 / -0
    The virus on which Temin worked is
    Solution
    Harward Martin Temin was a geneticist and virologist too. He received a noble prize for reverse transcriptase discovery. After that, he worked on the viral sequences that control the packaging of viral DNA and also the retroviral variation. 
  • Question 6
    1 / -0
    Viruses multiply in 
    Solution
    Viruses are the microorganisms that are not visible to the naked eye. They can be visualized under a microscope. They are called acellular organisms as they are not capable of reproducing by themselves and requiring a host to multiply. So they invade other organisms like bacteria,  humans or any living organisms. The viruses that attack the bacteria are called bacteriophages 
    Some of the viruses that attacks humans are polio virus, HIV etc. Thus, the correct answer is option B.
  • Question 7
    1 / -0
    Satellite virus is 
    Solution
    Satellite viruses are the defective virus-like particles, mostly consist of a naked strand of nucleic acid and depend on helper viruses for their multiplication and host cell infection. The helper viruses are also called as activator viruses or autonomous or independent viruses that can infect the host cell without the help of another virus. Thus, the correct answer is option B.
  • Question 8
    1 / -0
    Helper virus is called as
    Solution
    Helper virus is the virus which acts as a helper for the virus which cannot replicate their genetic material on their own. This virus coinfect along with the vector virus and helps to replicate the genetic material by providing the enzyme for the replication. For example, hepatitis D virus which requires hepatitis B virus as helper virus which provides the outer protein to this vector virus(hepatitis D virus). Thus, the correct answer is option B.
  • Question 9
    1 / -0
    Which statement is wrong for viruses?
    Solution
    Viruses are the microorganisms which injects a living host and remain as intercellular parasite. They inject their genetic material which replicates using host cell machinery and reform their structure and attain viable structure capable enough to affect other cells. They have ability to synthesize nucleic acids by replication. Antibiotics do not acts against virus as they are made up of polymorphic protein coat. Viruses have different type of symmetry like icosahedral and helical. So, the correct answer is option B.
  • Question 10
    1 / -0
    Who proposed the phanerogram of virus?
    Solution
    Lwoff and Tournier are the two scientists who proposed the classification of the viruses. They described the viruses as virus phanerogams. The classification was performed on the basis of genetic material, the presence of envelope or coat, the number of protein subunits, structure, symmetry and size.
    Thus, the correct answer is option A. 
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