Prions, Viroids, Bacteria, and Virus Diseases

During the lytic infection by a virus, the host cell is-

• destroyed
• copied
• passed on to the lysogenic cycle
• not affected

The purpose of the protein coat surrounding a virus, other than to protect the virus, is to-

• react with the cell membrane of the host cell

• release hereditary information into the host cell

• produce proteins within the host cell

• destroy the nucleus of the host cell

Which statement regarding viruses is true?

• a virus can only reproduce inside of a living cell
• viruses do not contain DNA
• viruses are unicellular
• viruses are generally larger than cells

The capsid of a virus protects the virus from the external environment. What structure is this similar to in a plant cell?

• ribosome
• cell membrane
• vacuole
• cell wall

What feature do viruses have in common with animal cells?

• ability to form proteins at the ribosomes
• existence of lipids in cell membranes
• presence of genetic code in nucleic acid
• production of energy by a mitochondrion

Which best describes the basic structure of a virus?

• nucleic acid strand surrounded by a protein coat
• a tail surrounded by a protein coat
• a tail surrounded by a carbohydrate coat
• nucleic acid strand surrounded by a carbohydrate coat

All viruses contain-

• nucleic acids
• ribosomes
• mitochondria
• cytoplasm

What part of the phage is the DNA?

• A
• B
• C
• D

Tags

NGSS.HS-LS1-1

A(n) _____ is a virus that enters a bacterial cell.

• endospore
• decomposer
• plasmid
• bacteriophage

When a virus invades a living cell, its _______
takes over the cell's functions.

• outer coat
• genetic material
• core
• cytoplasm