Viruses 1

A  FALSE

B  TRUE

A  TRUE

B  FALSE

A  Ultraviolet light

B  An electrical charge

C  Darkness

D  A competing phage

E  Lack of nutrients

A  phage DNA being actively expressed

B  phage protein left outside the bacterium

C  toxic to the host bacterial cell

D  phage DNA integrated into host cell genome

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

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

C  phage DNA remains inside the protein coat

D  phage genes exist as prophage

A  FALSE

B  TRUE

A  TRUE

B  FALSE

A  endocytosis

B  budding

C  lysis of the host cell

D  phagocytosis

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

B  surrounds the viral matrix protein

C  is dissolved

D  engulfs the viral spikes

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

B  viral spike proteins are inserted into the host cell membrane

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

D  the viral capsid becomes enclosed by the cell membrane

A  FALSE

B  TRUE

A  latent

B  lysogenic

C  lytic

D  acute

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

B  By receptor-mediated endocytosis

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  transmembrane proteins that allow the virus to escape the cell

C  lipases that allow the virus to escape the cell

D  spike proteins that are inserted into the plasma membrane

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

B  rapid reproduction of new bacterial cells

C  mutation of bacterial DNA

D  incorporation of viral DNA into the bacterial chromosome

A  bacterial endospores

B  new viral particles

C  bacterial flagella

D  bacterial exotoxins

A  FALSE

B  TRUE

A  Bacterial ribosomes

B  The bacterial chromosome

C  The cytoplasmic membrane

D  The bacterial cell wall

A  assembly

B  penetration

C  release

D  synthesis

A  tobacco leaves

B  Staphylococcus aureus

C  Clostridium tetani

D  Escherichia coli

A  adsorption, penetration, synthesis, release, assembly

B  adsorption, penetration, release, synthesis, assembly

C  penetration, synthesis, assembly, release

D  adsorption, penetration, synthesis, assembly, release

A  a subunit of the viral cell wall

B  a protein shell that surrounds the nucleic acid

C  a phospholipid bilayer that surrounds the nucleic acid

D  made up mainly of polysaccharides

A  TRUE

B  FALSE

A  Synthesis

B  Adsorption

C  Penetration

D  Release

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  The synthesis of new virions will occur

B  A new envelope will surround the nucleic acid

C  The virus will kill the cell

D  The genetic material of the virus will disintegrate

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 the whole virion and forms a vesicle

C  the host cell’s plasma membrane surrounds only the viral protein acid coat and forms a vesicle

D  the host cell’s plasma membrane surrounds only the viral nucleic acid coat and forms a vesicle

A  are made of lipids

B  are present in all viruses

C  attach nonspecifically to host cell receptors

D  attach specifically to host cell receptors

A  FALSE

B  TRUE

A  Proteins and lipids

B  Peptidoglycan

C  Carbohydrates

D  Nucleic acid

A  protein

B  lipids

C  nucleic acids

D  carbohydrates

A  DNA

B  either DNA or RNA

C  DNA and RNA

D  ribosomes