When Hershey and Chase labeled viruses with radioactive phosphorus, they concluded that the virus
injects DNA and not protein into its host because the
a. radioactive protein ended up inside the bacterium
b. radioactive DNA ended up inside the bacterium
c. both radioactive DNA and protein ended up inside the bacterium
d. neither radioactive DNA nor protein ended up inside the bacterium
e. entire virus ended up inside the bacterium
B
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A(n) ________ is a drug that blocks the function of a metabolic pathway.
Fill in the blank(s) with the appropriate word(s).
If an organism has four copies of each chromosome, then it is
A. aneuploidy. B. diploid. C. haploid. D. tetraploid. E. polyploidy.
Carbon and hydrogen have similar electronegativities and combine together to form hydrocarbon molecules. What type of bonds form between these atoms?
A. hydrogen B. ionic C. polar covalent D. nonpolar covalent E. electrostatic
Why is it probably not a good idea to drink water directly from a mountain stream (i.e., untreated)
even if it appears to be unaffected by human activities?
What will be an ideal response?