Viruses 1

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  An electrical charge

B  A competing phage

C  Darkness

D  Ultraviolet light

E  Lack of nutrients

A  phage DNA integrated into host cell genome

B  toxic to the host bacterial cell

C  phage protein left outside the bacterium

D  phage DNA being actively expressed

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

B  phage DNA remains inside the protein coat

C  phage genes exist as prophage

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

A  FALSE

B  TRUE

A  TRUE

B  FALSE

A  endocytosis

B  lysis of the host cell

C  budding

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  engulfs the viral spikes

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  viral spike proteins are inserted into the host cell membrane

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

A  TRUE

B  FALSE

A  lytic

B  lysogenic

C  latent

D  acute

A  By receptor-mediated endocytosis

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

C  By fusion with the cell’s plasma membrane

D  It is injected

A  transmembrane proteins that allow the virus to escape the cell

B  lipases that allow the virus to escape the cell

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

D  spike proteins that are inserted into the plasma membrane

A  incorporation of viral DNA into the bacterial chromosome

B  rapid reproduction of new bacterial cells

C  mutation of bacterial DNA

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

A  bacterial endospores

B  new viral particles

C  bacterial exotoxins

D  bacterial flagella

A  TRUE

B  FALSE

A  Bacterial ribosomes

B  The cytoplasmic membrane

C  The bacterial cell wall

D  The bacterial chromosome

A  assembly

B  release

C  synthesis

D  penetration

A  tobacco leaves

B  Staphylococcus aureus

C  Escherichia coli

D  Clostridium tetani

A  penetration, synthesis, assembly, release

B  adsorption, penetration, synthesis, assembly, release

C  adsorption, penetration, synthesis, release, assembly

D  adsorption, penetration, release, synthesis, assembly

A  made up mainly of polysaccharides

B  a protein shell that surrounds the nucleic acid

C  a subunit of the viral cell wall

D  a phospholipid bilayer that surrounds the nucleic acid

A  TRUE

B  FALSE

A  Penetration

B  Adsorption

C  Release

D  Synthesis

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  A new envelope will surround the nucleic acid

B  The synthesis of new virions will occur

C  The genetic material of the virus will disintegrate

D  The virus will kill the cell

A  FALSE

B  TRUE

A  TRUE

B  FALSE

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 nucleic acid coat and forms a vesicle

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

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

A  are present in all viruses

B  attach specifically to host cell receptors

C  are made of lipids

D  attach nonspecifically to host cell receptors

A  FALSE

B  TRUE

A  Carbohydrates

B  Proteins and lipids

C  Nucleic acid

D  Peptidoglycan

A  protein

B  carbohydrates

C  lipids

D  nucleic acids

A  ribosomes

B  DNA

C  DNA and RNA

D  either DNA or RNA