Chapter 17 Mastering Bio – Flashcards
Unlock all answers in this set
Unlock answersquestion
A plant that has been raised in a sterile environment shows symptoms of a viral infection. How would you explain this?
answer
symptoms from vertical transmission.
question
The H1N1 2009 outbreak is considered to have been which of the following?
answer
Pandemic
question
Identify all correct statements about how viroids differ from viruses.
answer
Identify all correct statements about how viroids differ from viruses.
question
The genetic material of HIV consists of
answer
single stranded RNA
question
What is the function of reverse transcriptase
answer
It catalyzes the formation of DNA from an RNA template.
question
What is the source of a viral envelope?
answer
host cell membrane
question
Double-stranded viral DNA is incorporated into a host cell as a
answer
Provirus
question
Viral DNA makes mRNA by the process of
answer
transcription
question
What is the genetic material of retroviruses?
answer
RNA
question
What does the Borna virus target ?
answer
mammals and birds
question
Which of the following is NOT a characteristic of living things?
answer
creating energy
question
Homeostasis is a living organism's
answer
ability to maintain constant internal conditions even when environmental conditions change.
question
Which of the following can be found in bacteria, but not viruses?
answer
a cell membrane
question
Viruses are
answer
not alive because they are not made of cells and require a host cell for reproduction.
question
Which of the following statements about viruses is FALSE?
answer
The widespread use of antibiotics has led to resistant strains of viruses(antibiotics has no affect on viruses)
question
Why is combination drug therapy for HIV/AIDS less likely to lead to resistance than single drug therapy?
answer
The likelihood of one virus spontaneously mutating to be resistant to several different drugs at the same time is extremely small.
question
Suppose you were in charge of sending an unmanned space probe to a new planet in search of life. The probe would be able to collect and test samples and make observations, but the planet is too far away for the probe to be able to bring samples back to Earth. The probe is small and would only be able to run a few tests, so you want to pick a test for evidence of life that is broad enough to incorporate all forms of life as we know it. Which one of the following tests would be the best to use in this situation?
answer
a test for the presence of cells that contain DNA.
