Viruses 1

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  Lack of nutrients

B  A competing phage

C  Ultraviolet light

D  Darkness

E  An electrical charge

A  phage DNA integrated into host cell genome

B  phage protein left outside the bacterium

C  toxic to the host bacterial cell

D  phage DNA being actively expressed

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  FALSE

B  TRUE

A  FALSE

B  TRUE

A  lysis of the host cell

B  phagocytosis

C  budding

D  endocytosis

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  viral spike proteins are inserted into the host cell membrane

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

C  the viral capsid becomes enclosed by the cell membrane

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

A  TRUE

B  FALSE

A  lytic

B  acute

C  lysogenic

D  latent

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

B  By fusion with the cell’s plasma membrane

C  By receptor-mediated endocytosis

D  It is injected

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  rapid reproduction of new bacterial cells

B  mutation of bacterial DNA

C  incorporation of viral DNA into the bacterial chromosome

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

A  bacterial flagella

B  bacterial endospores

C  new viral particles

D  bacterial exotoxins

A  FALSE

B  TRUE

A  The cytoplasmic membrane

B  The bacterial cell wall

C  Bacterial ribosomes

D  The bacterial chromosome

A  release

B  assembly

C  synthesis

D  penetration

A  Clostridium tetani

B  Staphylococcus aureus

C  tobacco leaves

D  Escherichia coli

A  adsorption, penetration, synthesis, release, assembly

B  adsorption, penetration, release, synthesis, assembly

C  adsorption, penetration, synthesis, assembly, release

D  penetration, synthesis, assembly, release

A  a protein shell that surrounds the nucleic acid

B  a phospholipid bilayer that surrounds the nucleic acid

C  made up mainly of polysaccharides

D  a subunit of the viral cell wall

A  TRUE

B  FALSE

A  Adsorption

B  Penetration

C  Synthesis

D  Release

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  The genetic material of the virus will disintegrate

B  The virus will kill the cell

C  The synthesis of new virions will occur

D  A new envelope will surround the nucleic acid

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  viral spikes fuse with the host cell’s plasma membrane to form 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 the whole virion and forms a vesicle

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

A  attach specifically to host cell receptors

B  are present in all viruses

C  are made of lipids

D  attach nonspecifically to host cell receptors

A  TRUE

B  FALSE

A  Nucleic acid

B  Proteins and lipids

C  Carbohydrates

D  Peptidoglycan

A  protein

B  lipids

C  carbohydrates

D  nucleic acids

A  either DNA or RNA

B  ribosomes

C  DNA

D  DNA and RNA