Viruses 1

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  An electrical charge

B  A competing phage

C  Darkness

D  Lack of nutrients

E  Ultraviolet light

A  phage protein left outside the bacterium

B  phage DNA integrated into host cell genome

C  phage DNA being actively expressed

D  toxic to the host bacterial cell

A  phage DNA remains inside the protein coat

B  phage genes integrate into the host cell genome and are not expressed

C  phage genes exist as prophage

D  phage nucleic acid is replicated and phage genes are expressed, making new phage protein and lysing the host cell

A  TRUE

B  FALSE

A  FALSE

B  TRUE

A  lysis of the host cell

B  phagocytosis

C  budding

D  endocytosis

A  is dissolved

B  becomes completely enclosed by the region of the cell membrane into which the spikes and matrix protein are embedded

C  surrounds the viral matrix protein

D  engulfs the viral spikes

A  the inside of the host cell membrane becomes coated with viral matrix protein

B  the inside of the host cell membrane becomes coated with capsid

C  viral spike proteins are inserted into the host cell membrane

D  the viral capsid becomes enclosed by the cell membrane

A  FALSE

B  TRUE

A  latent

B  acute

C  lysogenic

D  lytic

A  It is injected

B  By receptor-mediated endocytosis

C  It attaches to receptors which bring in a single-strand

D  By fusion with the cell’s plasma membrane

A  regulatory proteins which direct the production and assembly of the capsid proteins

B  spike proteins that are inserted into the plasma membrane

C  lipases that allow the virus to escape the cell

D  transmembrane proteins that allow the virus to escape the cell

A  incorporation of viral DNA into the bacterial chromosome

B  rapid reproduction of new bacterial cells

C  mutation of bacterial DNA

D  lysis of the bacterial cell and release of new viral particles

A  bacterial endospores

B  new viral particles

C  bacterial exotoxins

D  bacterial flagella

A  FALSE

B  TRUE

A  Bacterial ribosomes

B  The cytoplasmic membrane

C  The bacterial cell wall

D  The bacterial chromosome

A  synthesis

B  penetration

C  release

D  assembly

A  tobacco leaves

B  Clostridium tetani

C  Escherichia coli

D  Staphylococcus aureus

A  adsorption, penetration, synthesis, assembly, release

B  penetration, synthesis, assembly, release

C  adsorption, penetration, synthesis, release, assembly

D  adsorption, penetration, release, synthesis, assembly

A  a subunit of the viral cell wall

B  a protein shell that surrounds the nucleic acid

C  made up mainly of polysaccharides

D  a phospholipid bilayer that surrounds the nucleic acid

A  FALSE

B  TRUE

A  Penetration

B  Release

C  Adsorption

D  Synthesis

A  FALSE

B  TRUE

A  TRUE

B  FALSE

A  The synthesis of new virions will occur

B  The genetic material of the virus will disintegrate

C  A new envelope will surround the nucleic acid

D  The virus will kill the cell

A  FALSE

B  TRUE

A  TRUE

B  FALSE

A  viral spikes fuse with the host cell’s plasma membrane to form a vesicle

B  the host cell’s plasma membrane surrounds only the viral protein acid coat and forms a vesicle

C  the host cell’s plasma membrane surrounds only the viral nucleic acid coat and forms a vesicle

D  the host cell’s plasma membrane surrounds the whole virion and forms a vesicle

A  attach nonspecifically to host cell receptors

B  are made of lipids

C  attach specifically to host cell receptors

D  are present in all viruses

A  TRUE

B  FALSE

A  Peptidoglycan

B  Carbohydrates

C  Nucleic acid

D  Proteins and lipids

A  protein

B  lipids

C  nucleic acids

D  carbohydrates

A  DNA

B  either DNA or RNA

C  ribosomes

D  DNA and RNA