Which conditions are needed to inactivate the complement____? A: 56℃,30min B: 56℃,80min C: 100℃,5min D: 37℃,10min

Which one might be encoded by the R determinants of R plasmid? A: DNA polymerase; B: The enzymes can inactivate the antibiotics. C: RNA polymerase; D: Gyrase;

Which of the following methods cannot inactivate HIV? A: 75% ethanol B: Ultraviolet light C: Iodine tincture D: Sodium hypochlorite E: Heating under 100℃ for 20 minutes

Which<br/>of the following is a limitation of the autoclave() A: It<br/>takes too long to sterilize B: It<br/>lacks the ability to inactivate viruses C: It<br/>lacks the ability to kill endospores D: It<br/>will destroy heat labile materials E: It<br/>cannot be used with glasswar

Interferons are an important part of the host defense against viral infections. What is interferon’s principal mode of action? A: It is present in the serum of healthy individuals, providing a viral surveillance role. B: It coats viral particles and blocks their attachment to cells. C: It induces synthesis of one or more cellular proteins that inhibit translation or transcription. D: It protects the virus-infected cell that produced it from cell death. E: It directly inactivate the viruses.