Question

A \[{T_4}\] bacteriophage has a gene for the enzyme, lysozyme. The function of this enzyme is to digest:
A. Cell wall    
B. Cell membrane
C. Golgi                                       
D. Plasmid

Answer 1

Hint: Bacteriophage are the viruses that infect and reproduce within bacteria. They are commonly referred to as a phage. They are found anywhere. They contain RNA or DNA in their genome, which is encapsulated in a protein coat. They also contaminate archaea. 

Complete step-by-step answer:
 Bacteriophage \[{T_4}\]is categorised as a member of the Myoviridae family of the Caudovirales order because it contains a contractile tail.
Bacteriophage \[{T_4}\] has a nonenveloped, Icosahedral head, the tail is hollow with complex contractile structure, and has tail fibres.
It endures only a lytic life cycle, no lysogenic cycle. Within the human body, the powerful enzyme lysozyme destroys the chemical bonds in the peptidoglycan layer of an external cell wall of bacteria to improve nucleic acid extraction efficiency or protein.
The peptidoglycan layer is comprised of a strong glycan chain of alternating N-acetylglucosamine and N-acetylmuramic acid molecules. This chain of molecules makes up the ''backbone'' of the bacterial cell wall. It acts as an antimicrobial agent by cleaving the peptidoglycan ingredient of bacterial cell walls, which results in cell death. 
The presence of lysozyme in mucus, and saliva, as an antibacterial enzyme in tears helps in preventing bacteria from entering the body through the nose, mouth, and eyes.

Therefore the correct answer is Option A.

Note: Lysozyme is a [\~14{\rm{ }}kDa\] protein found in many mucosal secretions (saliva, tears, and mucus) and tissues of plants and animals, and plays a significant role in innate immunity, providing protection against viruses, bacteria, and fungi. This enzyme acts as strong chemical protection against bacterial infections.