Viruses 1

A  TRUE

B  FALSE

A  FALSE

B  TRUE

A  Ultraviolet light

B  A competing phage

C  An electrical charge

D  Darkness

E  Lack of nutrients

A  phage protein left outside the bacterium

B  toxic to the host bacterial cell

C  phage DNA integrated into host cell genome

D  phage DNA being actively expressed

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

B  phage DNA remains inside the protein coat

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  TRUE

B  FALSE

A  lysis of the host cell

B  phagocytosis

C  endocytosis

D  budding

A  engulfs the viral spikes

B  surrounds the viral matrix protein

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

D  is dissolved

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

B  the viral capsid becomes enclosed by the cell membrane

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

D  viral spike proteins are inserted into the host cell membrane

A  TRUE

B  FALSE

A  latent

B  lytic

C  acute

D  lysogenic

A  By fusion with the cell’s plasma membrane

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

C  By receptor-mediated endocytosis

D  It is injected

A  spike proteins that are inserted into the plasma membrane

B  lipases that allow the virus to escape the cell

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

D  transmembrane proteins that allow the virus to escape the cell

A  mutation of bacterial DNA

B  incorporation of viral DNA into the bacterial chromosome

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

D  rapid reproduction of new bacterial cells

A  new viral particles

B  bacterial exotoxins

C  bacterial endospores

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  release

C  penetration

D  assembly

A  Clostridium tetani

B  Staphylococcus aureus

C  Escherichia coli

D  tobacco leaves

A  penetration, synthesis, assembly, release

B  adsorption, penetration, release, synthesis, assembly

C  adsorption, penetration, synthesis, release, assembly

D  adsorption, penetration, synthesis, assembly, release

A  made up mainly of polysaccharides

B  a protein shell that surrounds the nucleic acid

C  a subunit of the viral cell wall

D  a phospholipid bilayer that surrounds the nucleic acid

A  TRUE

B  FALSE

A  Release

B  Synthesis

C  Penetration

D  Adsorption

A  FALSE

B  TRUE

A  TRUE

B  FALSE

A  The genetic material of the virus will disintegrate

B  The synthesis of new virions will occur

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

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

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

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

A  are present in all viruses

B  are made of lipids

C  attach nonspecifically to host cell receptors

D  attach specifically to host cell receptors

A  TRUE

B  FALSE

A  Proteins and lipids

B  Nucleic acid

C  Carbohydrates

D  Peptidoglycan

A  nucleic acids

B  lipids

C  carbohydrates

D  protein

A  either DNA or RNA

B  DNA and RNA

C  ribosomes

D  DNA