UNE-Microbiology Unit 2 Questions
with Complete Solutions 2025-2026
Updated.
Which of the following is the correct order for phage replication? - Answer Attachment,
penetration, biosynthesis, assembly, and release
The viral capsid - Answer -Contains functional projections from the lipid bilayer called spikes.
-Is subdivided to capsomeres in some viruses
-is a protective covering for the genome
-is responsible for the symmetry of a virus
-may contain enzymes to assist in penetration of the host cell.
The viral envelope - Answer -Confers greater susceptibility to disinfectants
-Is a flexible membrane composed of protein and lipid
-Is similar to the host membrane except with viral components
-fuses with the cell membrane in infection
-is acquired by "budding"
The viral capsomere - Answer -Number is characteristic for a particular virus
-Is a protein subunit of the capsid
The viral genome - Answer -Must enter the host cytoplasm for replication to occur
-Is affected by base analogs in viral inhibition
, -may be either DNA or RNA but not both
-consists of nucleic acid
-exists in segments in some viruses
Prokaryotic defenses against viruses includes - Answer Restriction modification systems
What is the difference between a viroid and a prion? - Answer A viroid is infectious RNA and
a prion is infectious protein
antigenic shift - Answer Major change in a viral surface antigen that render antibodies made
against the previous version ineffective
Acute infection - Answer Illness characterized by signs and symptoms that develop quickly
but last a relatively short time
Arbovirus - Answer Arthropod-borne virus; one of a large group of RNA viruses carried by
insects and mites that act as biological vectors
Bacteriophage - Answer A virus that infects bacteria; often abbreviated to phage
Capsid - Answer Protein coat surrounding the nucleic acid of a virus
Chronic infection - Answer Infection that develop slowly and persist for months or years
Enveloped virus - Answer Characterized by a lipid bilayer surrounding the nucleocapsid
generalized transduction - Answer A type of horizontal gene transfer occuring when a phage
carries a random piece of bacterial DNA acquired when a packaging error occurs during the
assembly of phage particles
Latent infection - Answer Infection in which the infectious agent is present but not active
Lysogenic conversion - Answer The modification of cell properties resulting from expression
of phage DNA integrated into a bacterial chromosome
with Complete Solutions 2025-2026
Updated.
Which of the following is the correct order for phage replication? - Answer Attachment,
penetration, biosynthesis, assembly, and release
The viral capsid - Answer -Contains functional projections from the lipid bilayer called spikes.
-Is subdivided to capsomeres in some viruses
-is a protective covering for the genome
-is responsible for the symmetry of a virus
-may contain enzymes to assist in penetration of the host cell.
The viral envelope - Answer -Confers greater susceptibility to disinfectants
-Is a flexible membrane composed of protein and lipid
-Is similar to the host membrane except with viral components
-fuses with the cell membrane in infection
-is acquired by "budding"
The viral capsomere - Answer -Number is characteristic for a particular virus
-Is a protein subunit of the capsid
The viral genome - Answer -Must enter the host cytoplasm for replication to occur
-Is affected by base analogs in viral inhibition
, -may be either DNA or RNA but not both
-consists of nucleic acid
-exists in segments in some viruses
Prokaryotic defenses against viruses includes - Answer Restriction modification systems
What is the difference between a viroid and a prion? - Answer A viroid is infectious RNA and
a prion is infectious protein
antigenic shift - Answer Major change in a viral surface antigen that render antibodies made
against the previous version ineffective
Acute infection - Answer Illness characterized by signs and symptoms that develop quickly
but last a relatively short time
Arbovirus - Answer Arthropod-borne virus; one of a large group of RNA viruses carried by
insects and mites that act as biological vectors
Bacteriophage - Answer A virus that infects bacteria; often abbreviated to phage
Capsid - Answer Protein coat surrounding the nucleic acid of a virus
Chronic infection - Answer Infection that develop slowly and persist for months or years
Enveloped virus - Answer Characterized by a lipid bilayer surrounding the nucleocapsid
generalized transduction - Answer A type of horizontal gene transfer occuring when a phage
carries a random piece of bacterial DNA acquired when a packaging error occurs during the
assembly of phage particles
Latent infection - Answer Infection in which the infectious agent is present but not active
Lysogenic conversion - Answer The modification of cell properties resulting from expression
of phage DNA integrated into a bacterial chromosome
