Members of the genus Bacillus are spore-forming, aerobic, and catalase positive.
Answer the following statement true (T) or false (F)
True
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Describe the hypothesis of viruses occurring before living cells and how DNA might have evolved. What is the current hypothesis about the evolutionary relationships between RNA, DNA, viruses, and cellular life?
What will be an ideal response?
At the breakfast table, your roommate says, "Oops! I forgot to take my melatonin last night. I'd better take it now." How do you respond?
A. "Good idea -- you don't want your bones to get brittle." B. "Be sure not to take too much, or your blood sugar could get dangerously low." C. "Don't take it now - it regulates biological rhythms, and is normally high at night and low during the day." D. "Don't take it after a meal - it promotes the 'fight-or-flight' response, not 'rest-and-digest'." Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about melatonin? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
When a phage has its DNA inserted into the host cell genome it is called a
1.lytic phage. 2.temperate phage. 3.prophage. 4.provirus. 5.All of the options are correct.
Which of the following accounts for someone who has had regular herpesvirus-mediated cold sore or genital sore flare-ups?
A) re-infection by a closely related herpesvirus of a different strain B) re-infection by the same herpesvirus strain C) copies of the herpesvirus genome permanently maintained in host nuclei D) copies of the herpesvirus genome permanently maintained in host cell cytoplasm