unit 4.5 viruses prac problems

Which of the following are features of viruses that allow them to evolve rapidly?

large population size, short generation time, and high mutation rate

Which of the following is true of viruses that contain RNA?

positive sense RNA can be used directly as mRNA to be translated into proteins

Which of the following is true of viruses that contain RNA?

negative sense RNA must be transcribed first before it can be used to make proteins

Which of the following is a coat made of proteins that is unique to each virus?

Capsid

Which of the following describes the nucleic acids that may be found in viruses?

single-stranded DNA

Which of the following describes the nucleic acids that may be found in viruses?

single-stranded RNA

Which of the following describes the nucleic acids that may be found in viruses?

double-stranded DNA

Which of the following describes the nucleic acids that may be found in viruses?

double-stranded RNA

Which of the following describes the nucleic acids that may be found in viruses?

circular DNA

Which of the following describes the nucleic acids that may be found in viruses?

linear DNA

During the lysogenic cycle, is the host cell killed?

is not

During the lytic cycle, what host cell structures are used to synthesize viral proteins?

ribosomes

Which of the following is NOT true regarding viruses?

Viruses contain RNA only

A bacteriophage is a virus that infects

bacteria

Viruses contain cytoplasm.

False

Which of the following viruses contains RNA and uses the enzyme RNA transcriptase to create double stranded DNA that can be incorporated into the host T-helper cell's genome?

HIV

Viruses can grow.

False

Which statement about viral envelopes is true?

The envelope is found outside the protein capsid

Which statement about viral envelopes is true?

The envelope can contain proteins that help the virus infect cells

Which statement about viral envelopes is true?

The envelope is derived from the host cell's plasma membrane

Which statement about viral envelopes is true?

Most viruses that infect animals have an envelope

Viruses are categorized as obligate parasites. This means that a virus

must invade a host cell in order to replicat