Viruses 1

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  Ultraviolet light

B  A competing phage

C  An electrical charge

D  Darkness

E  Lack of nutrients

A  phage DNA being actively expressed

B  toxic to the host bacterial cell

C  phage protein left outside the bacterium

D  phage DNA integrated into host cell genome

A  phage genes exist as prophage

B  phage DNA remains inside the protein coat

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

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

A  FALSE

B  TRUE

A  TRUE

B  FALSE

A  lysis of the host cell

B  budding

C  endocytosis

D  phagocytosis

A  is dissolved

B  surrounds the viral matrix protein

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  viral spike proteins are inserted into the host cell membrane

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

C  the viral capsid becomes enclosed by the cell membrane

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

A  TRUE

B  FALSE

A  latent

B  lysogenic

C  acute

D  lytic

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

B  By fusion with the cell’s plasma membrane

C  It is injected

D  By receptor-mediated endocytosis

A  transmembrane proteins that allow the virus to escape the cell

B  lipases that allow the virus to escape the cell

C  spike proteins that are inserted into the plasma membrane

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

A  incorporation of viral DNA into the bacterial chromosome

B  rapid reproduction of new bacterial cells

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

D  mutation of bacterial DNA

A  bacterial exotoxins

B  new viral particles

C  bacterial endospores

D  bacterial flagella

A  TRUE

B  FALSE

A  Bacterial ribosomes

B  The bacterial cell wall

C  The cytoplasmic membrane

D  The bacterial chromosome

A  synthesis

B  release

C  assembly

D  penetration

A  Clostridium tetani

B  tobacco leaves

C  Staphylococcus aureus

D  Escherichia coli

A  penetration, synthesis, assembly, release

B  adsorption, penetration, synthesis, assembly, release

C  adsorption, penetration, synthesis, release, assembly

D  adsorption, penetration, release, synthesis, assembly

A  a subunit of the viral cell wall

B  a phospholipid bilayer that surrounds the nucleic acid

C  made up mainly of polysaccharides

D  a protein shell that surrounds the nucleic acid

A  FALSE

B  TRUE

A  Release

B  Synthesis

C  Adsorption

D  Penetration

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  The synthesis of new virions will occur

B  The virus will kill the cell

C  The genetic material of the virus will disintegrate

D  A new envelope will surround the nucleic acid

A  FALSE

B  TRUE

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 only the viral nucleic acid coat 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 the whole virion and forms a vesicle

A  are made of lipids

B  attach nonspecifically to host cell receptors

C  are present in all viruses

D  attach specifically to host cell receptors

A  FALSE

B  TRUE

A  Carbohydrates

B  Nucleic acid

C  Proteins and lipids

D  Peptidoglycan

A  protein

B  lipids

C  nucleic acids

D  carbohydrates

A  DNA

B  either DNA or RNA

C  ribosomes

D  DNA and RNA