Viruses 1

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  Lack of nutrients

B  Darkness

C  An electrical charge

D  A competing phage

E  Ultraviolet light

A  phage protein left outside the bacterium

B  phage DNA being actively expressed

C  toxic to the host bacterial cell

D  phage DNA integrated into host cell genome

A  phage DNA remains inside the protein coat

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

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

D  phage genes exist as prophage

A  TRUE

B  FALSE

A  FALSE

B  TRUE

A  lysis of the host cell

B  endocytosis

C  budding

D  phagocytosis

A  is dissolved

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  engulfs the viral spikes

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

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 viral capsid becomes enclosed by the cell membrane

A  TRUE

B  FALSE

A  lytic

B  latent

C  acute

D  lysogenic

A  By receptor-mediated endocytosis

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

C  It is injected

D  By fusion with the cell’s plasma membrane

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

B  lipases that allow the virus to escape the cell

C  spike proteins that are inserted into the plasma membrane

D  transmembrane proteins that allow the virus to escape the cell

A  rapid reproduction of new bacterial cells

B  incorporation of viral DNA into the bacterial chromosome

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  FALSE

B  TRUE

A  The bacterial chromosome

B  The cytoplasmic membrane

C  The bacterial cell wall

D  Bacterial ribosomes

A  penetration

B  release

C  synthesis

D  assembly

A  Escherichia coli

B  tobacco leaves

C  Staphylococcus aureus

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 subunit of the viral cell wall

B  made up mainly of polysaccharides

C  a protein shell that surrounds the nucleic acid

D  a phospholipid bilayer that surrounds the nucleic acid

A  TRUE

B  FALSE

A  Release

B  Adsorption

C  Penetration

D  Synthesis

A  TRUE

B  FALSE

A  FALSE

B  TRUE

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  TRUE

B  FALSE

A  the host cell’s plasma membrane surrounds the whole virion 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 only the viral protein acid coat and forms 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  FALSE

B  TRUE

A  Proteins and lipids

B  Peptidoglycan

C  Carbohydrates

D  Nucleic acid

A  nucleic acids

B  carbohydrates

C  protein

D  lipids

A  either DNA or RNA

B  DNA and RNA

C  DNA

D  ribosomes