Viruses 1

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  Darkness

B  Ultraviolet light

C  A competing phage

D  An electrical charge

E  Lack of nutrients

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

C  phage genes exist as prophage

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

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  lysis of the host cell

B  phagocytosis

C  endocytosis

D  budding

A  engulfs the viral spikes

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  is dissolved

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 viral capsid becomes enclosed by the cell membrane

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

A  FALSE

B  TRUE

A  acute

B  lytic

C  lysogenic

D  latent

A  It is injected

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

C  By receptor-mediated endocytosis

D  By fusion with the cell’s plasma membrane

A  transmembrane proteins that allow the virus to escape the cell

B  spike proteins that are inserted into the plasma membrane

C  lipases that allow the virus to escape the cell

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

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

B  mutation of bacterial DNA

C  incorporation of viral DNA into the bacterial chromosome

D  rapid reproduction of new bacterial cells

A  bacterial endospores

B  bacterial exotoxins

C  bacterial flagella

D  new viral particles

A  TRUE

B  FALSE

A  The bacterial cell wall

B  Bacterial ribosomes

C  The cytoplasmic membrane

D  The bacterial chromosome

A  penetration

B  release

C  assembly

D  synthesis

A  tobacco leaves

B  Clostridium tetani

C  Escherichia coli

D  Staphylococcus aureus

A  adsorption, penetration, release, synthesis, assembly

B  penetration, synthesis, assembly, release

C  adsorption, penetration, synthesis, assembly, release

D  adsorption, penetration, synthesis, release, assembly

A  a phospholipid bilayer that surrounds the nucleic acid

B  a protein shell that surrounds the nucleic acid

C  made up mainly of polysaccharides

D  a subunit of the viral cell wall

A  FALSE

B  TRUE

A  Synthesis

B  Release

C  Adsorption

D  Penetration

A  FALSE

B  TRUE

A  TRUE

B  FALSE

A  The genetic material of the virus will disintegrate

B  The virus will kill the cell

C  A new envelope will surround the nucleic acid

D  The synthesis of new virions will occur

A  FALSE

B  TRUE

A  FALSE

B  TRUE

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 protein acid coat and forms a vesicle

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

D  viral spikes fuse with the host cell’s plasma membrane to form 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  TRUE

B  FALSE

A  Proteins and lipids

B  Carbohydrates

C  Nucleic acid

D  Peptidoglycan

A  nucleic acids

B  lipids

C  carbohydrates

D  protein

A  ribosomes

B  DNA and RNA

C  DNA

D  either DNA or RNA