Viruses 1

A  TRUE

B  FALSE

A  FALSE

B  TRUE

A  Darkness

B  Lack of nutrients

C  A competing phage

D  Ultraviolet light

E  An electrical charge

A  toxic to the host bacterial cell

B  phage protein left outside the bacterium

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 genes exist as prophage

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

D  phage DNA remains inside the protein coat

A  FALSE

B  TRUE

A  TRUE

B  FALSE

A  lysis of the host cell

B  budding

C  endocytosis

D  phagocytosis

A  engulfs the viral spikes

B  is dissolved

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 viral capsid becomes enclosed by the cell membrane

B  viral spike proteins are inserted into the host cell membrane

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

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

A  TRUE

B  FALSE

A  lysogenic

B  lytic

C  latent

D  acute

A  It is injected

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

C  By fusion with the cell’s plasma membrane

D  By receptor-mediated endocytosis

A  spike proteins that are inserted into the plasma membrane

B  transmembrane proteins that allow the virus to escape the cell

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

D  lipases that allow the virus to escape the cell

A  mutation of bacterial DNA

B  rapid reproduction of new bacterial cells

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

D  incorporation of viral DNA into the bacterial chromosome

A  bacterial exotoxins

B  new viral particles

C  bacterial flagella

D  bacterial endospores

A  TRUE

B  FALSE

A  The bacterial cell wall

B  The bacterial chromosome

C  Bacterial ribosomes

D  The cytoplasmic membrane

A  penetration

B  release

C  assembly

D  synthesis

A  Staphylococcus aureus

B  tobacco leaves

C  Escherichia coli

D  Clostridium tetani

A  adsorption, penetration, synthesis, assembly, release

B  penetration, synthesis, assembly, release

C  adsorption, penetration, release, synthesis, assembly

D  adsorption, penetration, synthesis, release, assembly

A  a protein shell that surrounds the nucleic acid

B  made up mainly of polysaccharides

C  a phospholipid bilayer that surrounds the nucleic acid

D  a subunit of the viral cell wall

A  FALSE

B  TRUE

A  Adsorption

B  Synthesis

C  Penetration

D  Release

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  A new envelope will surround the nucleic acid

B  The synthesis of new virions will occur

C  The virus will kill the cell

D  The genetic material of the virus will disintegrate

A  TRUE

B  FALSE

A  FALSE

B  TRUE

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

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

A  are made of lipids

B  attach specifically to host cell receptors

C  are present in all viruses

D  attach nonspecifically to host cell receptors

A  TRUE

B  FALSE

A  Nucleic acid

B  Peptidoglycan

C  Proteins and lipids

D  Carbohydrates

A  lipids

B  carbohydrates

C  protein

D  nucleic acids

A  ribosomes

B  either DNA or RNA

C  DNA and RNA

D  DNA