List and describe the structures of virusesc What will be an ideal response?
1. Nucleic acid core which is single-stranded or double-stranded DNA or RNA, never both.
2. Capsid protective protein coat.
3. Envelopes surround a capsid of some viruses and are composed of phospholipids and
proteins of hosts plasma membrane as well as distinctive viral proteins.
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The effects of most antimicrobial drugs are greater if the microorganisms are actively growing.
Answer the following statement true (T) or false (F)
The difference between the sugar in DNA and the sugar in RNA is that the sugar in DNA _____
A) is a six-carbon sugar and the sugar in RNA is a five-carbon sugar B) can form a double-stranded molecule C) is an aldehyde sugar and the sugar in RNA is a keto sugar D) is in the ? configuration and the sugar in RNA is in the ? configuration E) contains one less oxygen atom
Can the energy released as heat during respiration be recaptured and used to do additional work?
a. Yes b. No
Humans intrude into the nitrogen cycle by
A. disposing of human manure rather than allowing it to recycle. B. manufacturing nitrogen compounds to apply to agricultural fields. C. using antibiotics that destroy important bacteria in the nitrogen cycle. D. tying up nitrogen in human body mass because of overpopulation.