Acellular Life — Biology MCQs (Class 11)
Free chapter-wise Biology MCQs with answers for MDCAT, FSc and entry tests.
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#57 Influenza virus is an example of a:
A) DNA virus
B) RNA virus
C) Prion
D) Viroid
#58 Which scientist showed that a disease-causing agent could pass through a bacterial filter, suggesting it was smaller than a bacterium?
A) Louis Pasteur
B) Dmitri Ivanovsky
C) Martinus Beijerinck
D) Robert Koch
#59 What is the final step of the lytic cycle?
A) Adsorption
B) Biosynthesis
C) Lysis and release
D) Maturation
#60 Which of the following is the most significant difference between viruses and bacteria?
A) Viruses are smaller than bacteria.
B) Viruses can be crystallized, but bacteria cannot.
C) Viruses lack cellular machinery, while bacteria have it.
D) Viruses have a protein coat, while bacteria have a cell wall.
#61 The genome of the most animals and higher plants is:
A) DNA
B) RNA
C) Both DNA and RNA
D) Either DNA or RNA
#62 The genetic material of plant viruses mostly is:
A) DNA
B) RNA
C) Both DNA and RNA
D) Proteins
#63 Phage-virus secretes an enzyme "lysozyme" from its:
A) Tail region
B) Head region
C) Neck region
D) Capsule region
#64 Phage viruses are usually abundant in the intestine of man and animals because:
A) Abundant bacteria are present
B) Abundant water is present
C) Abundant nutrients are present
D) They can only live at human body temperature
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