Viruses 1

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  A competing phage

B  Ultraviolet light

C  Lack of nutrients

D  Darkness

E  An electrical charge

A  phage DNA being actively expressed

B  phage DNA integrated into host cell genome

C  phage protein left outside the bacterium

D  toxic to the host bacterial cell

A  phage genes exist as prophage

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 integrate into the host cell genome and are not expressed

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  endocytosis

B  lysis of the host cell

C  phagocytosis

D  budding

A  surrounds the viral matrix protein

B  is dissolved

C  engulfs the viral spikes

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 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  FALSE

B  TRUE

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  incorporation of viral DNA into the bacterial chromosome

B  mutation of bacterial DNA

C  rapid reproduction of new bacterial cells

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

A  bacterial exotoxins

B  new viral particles

C  bacterial endospores

D  bacterial flagella

A  TRUE

B  FALSE

A  The cytoplasmic membrane

B  Bacterial ribosomes

C  The bacterial cell wall

D  The bacterial chromosome

A  synthesis

B  release

C  assembly

D  penetration

A  Staphylococcus aureus

B  Escherichia coli

C  Clostridium tetani

D  tobacco leaves

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  FALSE

B  TRUE

A  Adsorption

B  Release

C  Penetration

D  Synthesis

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  A new envelope will surround the nucleic acid

B  The virus will kill the cell

C  The synthesis of new virions will occur

D  The genetic material of the virus will disintegrate

A  TRUE

B  FALSE

A  TRUE

B  FALSE

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 only the viral nucleic acid coat and forms a vesicle

C  the host cell’s plasma membrane surrounds the whole virion 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  are present in all viruses

C  attach specifically to host cell receptors

D  attach nonspecifically to host cell receptors

A  TRUE

B  FALSE

A  Proteins and lipids

B  Carbohydrates

C  Peptidoglycan

D  Nucleic acid

A  carbohydrates

B  protein

C  lipids

D  nucleic acids

A  DNA

B  either DNA or RNA

C  DNA and RNA

D  ribosomes