Viruses 1

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  Lack of nutrients

B  An electrical charge

C  Darkness

D  Ultraviolet light

E  A competing phage

A  phage protein left outside the bacterium

B  phage DNA being actively expressed

C  phage DNA integrated into host cell genome

D  toxic to the host bacterial cell

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

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 exist as prophage

A  TRUE

B  FALSE

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 capsid

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  lysogenic

B  latent

C  acute

D  lytic

A  By fusion with the cell’s plasma membrane

B  By receptor-mediated endocytosis

C  It is injected

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

A  transmembrane proteins that allow the virus to escape the cell

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

C  spike proteins that are inserted into the plasma membrane

D  lipases that allow the virus to escape the cell

A  rapid reproduction of new bacterial cells

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

C  mutation of bacterial DNA

D  incorporation of viral DNA into the bacterial chromosome

A  bacterial exotoxins

B  bacterial endospores

C  new viral particles

D  bacterial flagella

A  TRUE

B  FALSE

A  The bacterial chromosome

B  The cytoplasmic membrane

C  Bacterial ribosomes

D  The bacterial cell wall

A  penetration

B  release

C  assembly

D  synthesis

A  tobacco leaves

B  Clostridium tetani

C  Escherichia coli

D  Staphylococcus aureus

A  adsorption, penetration, synthesis, assembly, release

B  adsorption, penetration, synthesis, release, assembly

C  penetration, synthesis, assembly, release

D  adsorption, penetration, release, synthesis, assembly

A  a phospholipid bilayer that surrounds the nucleic acid

B  a protein shell that surrounds the nucleic acid

C  a subunit of the viral cell wall

D  made up mainly of polysaccharides

A  TRUE

B  FALSE

A  Adsorption

B  Release

C  Synthesis

D  Penetration

A  FALSE

B  TRUE

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  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  attach specifically to host cell receptors

B  attach nonspecifically to host cell receptors

C  are present in all viruses

D  are made of lipids

A  TRUE

B  FALSE

A  Carbohydrates

B  Proteins and lipids

C  Nucleic acid

D  Peptidoglycan

A  nucleic acids

B  lipids

C  protein

D  carbohydrates

A  either DNA or RNA

B  DNA and RNA

C  DNA

D  ribosomes