Acellular Life MCQs for MDCAT Practice

Biology section, Acellular Life chapter. Sample questions from past PMC papers.

1. Question 1
   What is the size of porcelain filter?
   • A.10–100 nm
   • B.100–1000 nm
   • C.10–100 micrometers
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2. Question 2
   Bacteriophages have been used widely in genetic research since they are the smallest and simplest biological entities capable of what?
   • A.Self replication in host cell
   • B.Duplication
   • C.Self duplication
   • D.Multiplication in host cell
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3. Question 3
   When was the bacteriophage phenomenon rediscovered by D'Herelle?
   • A.1918
   • B.1917
   • C.1920
   • D.1990
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4. Question 4
   Select the wrong statement
   • A.The term ‘contagium vivum fluidum' was coined by M. W. Beijerinck.
   • B.Mosaic disease in tobacco and AIDS in human beings are caused by viruses.
   • C.The viroids were discovered by D.J. Ivanovsky.
   • D.W. M. Stanley showed that viruses could be crystallized.
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5. Question 5
   AIDS virus penetrates into host's
   • A.Red blood cells
   • B.Platelets
   • C.Brain cells
   • D.Leukocytes
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6. Question 6
   Which of the following statements about ozone depletion is incorrect?
   • A.An ozone hole was discovered over ntarctica
   • B.CFCs are found in some air conditioning systems
   • C.Ozone in the upper atmosphere is beneficial because it absorbs infrared radiation
   • D.At ground level, ozone is a pollutant
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7. Question 7
   Which of the following has the morphology of a helical virus?
   • A.TMV
   • B.T4 Phage
   • C.Poxvirus
   • D.Herpes virus
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8. Question 8
   The difference between virus and viroid is;
   • A.Absence of protein coat in viroid, but present in virus
   • B.Presence of low molecular weight RNA in virus, but absent in viroid
   • C.Both A and B are correct
   • D.None of the above
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