A skin cell in G2 of interphase has _______________ as much DNA as it had in G1
A. half
B. twice
C. the same amount
D. one-fourth
E. four times
B
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Refer to the figure above. Which structure is responsible for stabilizing DNA in its single-stranded form?
A) A B) B C) C D) D
All of the following statements apply to G proteins EXCEPT ____
a. G proteins transmit a signal from the cell surface to the interior of the cell b. all G proteins have a similar structure c. G proteins do not use a second messenger but transmit the signal directly to the nucleus d. G proteins act to amplify the signal creating a cascade response in the cell e. G proteins are the target of toxins released by some pathogenic bacteria
Nucleic acid testing is appropriate as a testing method when one is not sure what microorganisms are present in the specimen.
Answer the following statement true (T) or false (F)
Even if people want to use sustainable energy sources and technologies, several barriers can limit their use. Which of the following is NOT a potential barrier to more widespread use of sustainable development practices or technologies?
a. sustainable energy can be much more expensive to produce than nonrenewable options b. construction and use of sustainable energy technologies can use hazardous chemicals or generate hazardous wastes that need to be carefully disposed of to avoid polluting the environment c. construction fo sustainable energy production facilities can destroy habitat d. the technology for energy production and harvesting from some sustainable sources still needs to be optimized e. all of the above are potential barriers to use of sustainable practices