Viruses 1

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  A competing phage

B  Ultraviolet light

C  An electrical charge

D  Darkness

E  Lack of nutrients

A  phage DNA being actively expressed

B  phage DNA integrated into host cell genome

C  toxic to the host bacterial cell

D  phage protein left outside the bacterium

A  phage DNA remains inside the protein coat

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

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

D  phage genes exist as prophage

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  lysis of the host cell

B  budding

C  endocytosis

D  phagocytosis

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

B  engulfs the viral spikes

C  surrounds the viral matrix protein

D  is dissolved

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

B  the viral capsid becomes enclosed by the cell membrane

C  viral spike proteins are inserted into the host cell membrane

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

A  TRUE

B  FALSE

A  lysogenic

B  acute

C  lytic

D  latent

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  lipases that allow the virus to escape the cell

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

C  transmembrane proteins that allow the virus to escape the cell

D  spike proteins that are inserted into the plasma membrane

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

B  mutation of bacterial DNA

C  rapid reproduction of new bacterial cells

D  incorporation of viral DNA into the bacterial chromosome

A  bacterial exotoxins

B  new viral particles

C  bacterial endospores

D  bacterial flagella

A  TRUE

B  FALSE

A  Bacterial ribosomes

B  The bacterial chromosome

C  The cytoplasmic membrane

D  The bacterial cell wall

A  release

B  assembly

C  penetration

D  synthesis

A  tobacco leaves

B  Clostridium tetani

C  Escherichia coli

D  Staphylococcus aureus

A  adsorption, penetration, synthesis, release, assembly

B  adsorption, penetration, release, synthesis, assembly

C  adsorption, penetration, synthesis, assembly, release

D  penetration, synthesis, assembly, release

A  made up mainly of polysaccharides

B  a subunit of the viral cell wall

C  a protein shell that surrounds the nucleic acid

D  a phospholipid bilayer that surrounds the nucleic acid

A  FALSE

B  TRUE

A  Release

B  Synthesis

C  Penetration

D  Adsorption

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  The virus will kill the cell

B  The synthesis of new virions will occur

C  The genetic material of the virus will disintegrate

D  A new envelope will surround the nucleic acid

A  TRUE

B  FALSE

A  TRUE

B  FALSE

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  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  attach nonspecifically to host cell receptors

B  are present in all viruses

C  are made of lipids

D  attach specifically to host cell receptors

A  TRUE

B  FALSE

A  Peptidoglycan

B  Nucleic acid

C  Proteins and lipids

D  Carbohydrates

A  lipids

B  carbohydrates

C  protein

D  nucleic acids

A  ribosomes

B  DNA and RNA

C  DNA

D  either DNA or RNA