Viruses 1

A  FALSE

B  TRUE

A  TRUE

B  FALSE

A  A competing phage

B  Lack of nutrients

C  An electrical charge

D  Ultraviolet light

E  Darkness

A  phage protein left outside the bacterium

B  phage DNA being actively expressed

C  phage DNA integrated into host cell genome

D  toxic to the host bacterial cell

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

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

C  phage genes exist as prophage

D  phage DNA remains inside the protein coat

A  FALSE

B  TRUE

A  TRUE

B  FALSE

A  lysis of the host cell

B  endocytosis

C  budding

D  phagocytosis

A  is dissolved

B  engulfs the viral spikes

C  surrounds the viral matrix protein

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

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

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

C  viral spike proteins are inserted into the host cell membrane

D  the viral capsid becomes enclosed by the cell membrane

A  TRUE

B  FALSE

A  latent

B  lysogenic

C  lytic

D  acute

A  By fusion with the cell’s plasma membrane

B  It is injected

C  By receptor-mediated endocytosis

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

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

B  transmembrane proteins that allow the virus to escape the cell

C  lipases that allow the virus to escape the cell

D  spike proteins that are inserted into the plasma membrane

A  incorporation of viral DNA into the bacterial chromosome

B  rapid reproduction of new bacterial cells

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

D  mutation of bacterial DNA

A  bacterial exotoxins

B  bacterial flagella

C  bacterial endospores

D  new viral particles

A  FALSE

B  TRUE

A  The cytoplasmic membrane

B  The bacterial cell wall

C  The bacterial chromosome

D  Bacterial ribosomes

A  assembly

B  penetration

C  release

D  synthesis

A  tobacco leaves

B  Staphylococcus aureus

C  Escherichia coli

D  Clostridium tetani

A  penetration, synthesis, assembly, release

B  adsorption, 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 phospholipid bilayer that surrounds the nucleic acid

C  a protein shell that surrounds the nucleic acid

D  made up mainly of polysaccharides

A  FALSE

B  TRUE

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  FALSE

B  TRUE

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

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

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

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

A  attach specifically to host cell receptors

B  attach nonspecifically to host cell receptors

C  are made of lipids

D  are present in all viruses

A  TRUE

B  FALSE

A  Peptidoglycan

B  Proteins and lipids

C  Carbohydrates

D  Nucleic acid

A  carbohydrates

B  protein

C  nucleic acids

D  lipids

A  either DNA or RNA

B  ribosomes

C  DNA

D  DNA and RNA