Acellular Life — Biology MCQs (Class 11)
Free chapter-wise Biology MCQs with answers for MDCAT, FSc and entry tests.
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#41 Which of the following viral diseases is spread by mosquitoes?
A) Polio
B) Dengue fever
C) Mumps
D) Measles
#42 What does the term "prophage" refer to?
A) A free-floating virus
B) Viral DNA integrated into a bacterial chromosome
C) A virus with a protein coat
D) A virus that infects plants
#43 Which of these is a characteristic of viroids?
A) They have a protein coat
B) They are infectious to humans
C) They are larger than viruses
D) They are naked RNA molecules
#44 Prions are believed to cause disease by:
A) Replicating their DNA
B) Converting normal proteins into misfolded, infectious forms
C) Producing toxins
D) Attacking the host cell's immune system
#45 The term "Acellular Life" primarily refers to:
A) Viruses, bacteria, and fungi
B) Viruses, prions, and viroids
C) Bacteria and fungi
D) Protists and viruses
#46 Which of the following statements about viruses is correct?
A) They are prokaryotic organisms.
B) They can be grown on artificial media.
C) They contain both DNA and RNA.
D) They lack metabolic machinery.
#47 The enzyme that catalyzes the synthesis of DNA from an RNA template in retroviruses is:
A) Helicase
B) DNA ligase
C) Reverse transcriptase
D) RNA polymerase
#48 A complex virus, such as a bacteriophage, typically has a head and a:
A) Tail
B) Envelope
C) Capsid
D) Sheath
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