Viruses 1

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  A competing phage

B  Darkness

C  Ultraviolet light

D  Lack of nutrients

E  An electrical charge

A  phage protein left outside the bacterium

B  toxic to the host bacterial cell

C  phage DNA being actively expressed

D  phage DNA integrated into host cell genome

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 DNA remains inside the protein coat

D  phage genes exist as prophage

A  FALSE

B  TRUE

A  TRUE

B  FALSE

A  budding

B  lysis of the host cell

C  phagocytosis

D  endocytosis

A  engulfs the viral spikes

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  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  latent

B  lysogenic

C  acute

D  lytic

A  By receptor-mediated endocytosis

B  By fusion with the cell’s plasma membrane

C  It is injected

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

A  spike proteins that are inserted into the plasma membrane

B  lipases that allow the virus to escape the cell

C  transmembrane proteins that allow the virus to escape the cell

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

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

B  rapid reproduction of new bacterial cells

C  incorporation of viral DNA into the bacterial chromosome

D  mutation of bacterial DNA

A  bacterial flagella

B  new viral particles

C  bacterial exotoxins

D  bacterial endospores

A  FALSE

B  TRUE

A  The bacterial chromosome

B  Bacterial ribosomes

C  The bacterial cell wall

D  The cytoplasmic membrane

A  synthesis

B  release

C  assembly

D  penetration

A  Escherichia coli

B  Staphylococcus aureus

C  tobacco leaves

D  Clostridium tetani

A  adsorption, penetration, synthesis, release, assembly

B  adsorption, penetration, synthesis, assembly, release

C  adsorption, penetration, release, synthesis, assembly

D  penetration, synthesis, assembly, release

A  a protein shell that surrounds the nucleic acid

B  a subunit of the viral cell wall

C  made up mainly of polysaccharides

D  a phospholipid bilayer that surrounds the nucleic acid

A  TRUE

B  FALSE

A  Penetration

B  Release

C  Adsorption

D  Synthesis

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  The virus will kill the cell

B  The genetic material of the virus will disintegrate

C  The synthesis of new virions will occur

D  A new envelope will surround the nucleic acid

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  viral spikes fuse with the host cell’s plasma membrane to form 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  the host cell’s plasma membrane surrounds only the viral nucleic acid coat and forms a vesicle

A  are made of lipids

B  are present in all viruses

C  attach nonspecifically to host cell receptors

D  attach specifically to host cell receptors

A  TRUE

B  FALSE

A  Nucleic acid

B  Carbohydrates

C  Peptidoglycan

D  Proteins and lipids

A  nucleic acids

B  lipids

C  protein

D  carbohydrates

A  DNA and RNA

B  ribosomes

C  DNA

D  either DNA or RNA