Viruses 1

A  TRUE

B  FALSE

A  FALSE

B  TRUE

A  Ultraviolet light

B  Darkness

C  Lack of nutrients

D  A competing phage

E  An electrical charge

A  toxic to the host bacterial cell

B  phage DNA being actively expressed

C  phage protein left outside the bacterium

D  phage DNA integrated into host cell genome

A  phage DNA remains inside the protein coat

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 genes integrate into the host cell genome and are not expressed

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  budding

B  endocytosis

C  phagocytosis

D  lysis of the host cell

A  engulfs the viral spikes

B  is dissolved

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

D  surrounds the viral matrix protein

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

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

C  the viral capsid becomes enclosed by the cell membrane

D  viral spike proteins are inserted into the host cell membrane

A  FALSE

B  TRUE

A  acute

B  lytic

C  lysogenic

D  latent

A  By receptor-mediated endocytosis

B  It is injected

C  By fusion with the cell’s plasma membrane

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

A  transmembrane proteins that allow the virus to escape the cell

B  spike proteins that are inserted into the plasma membrane

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  incorporation of viral DNA into the bacterial chromosome

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

A  bacterial flagella

B  bacterial exotoxins

C  new viral particles

D  bacterial endospores

A  FALSE

B  TRUE

A  The cytoplasmic membrane

B  Bacterial ribosomes

C  The bacterial chromosome

D  The bacterial cell wall

A  penetration

B  release

C  assembly

D  synthesis

A  Escherichia coli

B  Staphylococcus aureus

C  Clostridium tetani

D  tobacco leaves

A  penetration, synthesis, assembly, release

B  adsorption, penetration, synthesis, release, assembly

C  adsorption, penetration, release, synthesis, assembly

D  adsorption, penetration, synthesis, assembly, release

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  TRUE

B  FALSE

A  Adsorption

B  Release

C  Penetration

D  Synthesis

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  A new envelope will surround the nucleic acid

B  The virus will kill the cell

C  The genetic material of the virus will disintegrate

D  The synthesis of new virions will occur

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  viral spikes fuse with the host cell’s plasma membrane to form 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  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  attach specifically to host cell receptors

C  are present in all viruses

D  are made of lipids

A  FALSE

B  TRUE

A  Nucleic acid

B  Proteins and lipids

C  Carbohydrates

D  Peptidoglycan

A  protein

B  lipids

C  nucleic acids

D  carbohydrates

A  either DNA or RNA

B  ribosomes

C  DNA

D  DNA and RNA