Viruses 1

A  TRUE

B  FALSE

A  FALSE

B  TRUE

A  Darkness

B  Lack of nutrients

C  An electrical charge

D  A competing phage

E  Ultraviolet light

A  phage protein left outside the bacterium

B  toxic to the host bacterial cell

C  phage DNA integrated into host cell genome

D  phage DNA being actively expressed

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  FALSE

B  TRUE

A  FALSE

B  TRUE

A  endocytosis

B  phagocytosis

C  lysis of the host cell

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 viral capsid becomes enclosed by the 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  viral spike proteins are inserted into the host cell membrane

A  TRUE

B  FALSE

A  lytic

B  latent

C  lysogenic

D  acute

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  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  mutation of bacterial DNA

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

D  incorporation of viral DNA into the bacterial chromosome

A  new viral particles

B  bacterial endospores

C  bacterial flagella

D  bacterial exotoxins

A  TRUE

B  FALSE

A  The cytoplasmic membrane

B  The bacterial cell wall

C  Bacterial ribosomes

D  The bacterial chromosome

A  assembly

B  release

C  penetration

D  synthesis

A  tobacco leaves

B  Clostridium tetani

C  Staphylococcus aureus

D  Escherichia coli

A  adsorption, penetration, synthesis, release, assembly

B  penetration, synthesis, assembly, release

C  adsorption, penetration, synthesis, assembly, release

D  adsorption, penetration, release, synthesis, assembly

A  made up mainly of polysaccharides

B  a protein shell that surrounds the nucleic acid

C  a phospholipid bilayer that surrounds the nucleic acid

D  a subunit of the viral cell wall

A  TRUE

B  FALSE

A  Release

B  Synthesis

C  Penetration

D  Adsorption

A  FALSE

B  TRUE

A  TRUE

B  FALSE

A  A new envelope will surround the nucleic acid

B  The genetic material of the virus will disintegrate

C  The virus will kill the cell

D  The synthesis of new virions will occur

A  FALSE

B  TRUE

A  FALSE

B  TRUE

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

B  viral spikes fuse with the host cell’s plasma membrane to form 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 the whole virion 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  TRUE

B  FALSE

A  Peptidoglycan

B  Carbohydrates

C  Nucleic acid

D  Proteins and lipids

A  protein

B  carbohydrates

C  nucleic acids

D  lipids

A  DNA

B  DNA and RNA

C  ribosomes

D  either DNA or RNA