If antibiotics seem effective against a human illness, then this illness is probably caused by a/an:
A) virus. B) protist.
C) bacterium. D) autoimmune disease.
Answer: C
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Most of the water taken up by a plant is _____
A) used as a solvent B) used as a hydrogen source in photosynthesis C) lost during transpiration D) converted to carbon dioxide E) used to keep cells turgid
In the Hershey-Chase experiment, bacterial viruses, called phage, were used to demonstrate that DNA is the genetic material. The phage that were used for this experiment consisted of DNA surrounded by a protein coat. Phage will attach to specific types of bacteria and inject their DNA into the bacterial cell. To scientifically determine whether DNA is the genetic material, Hershey and Chase made phage in a medium containing radioactive sulfur-35 (S35 ). Why was S35 used in this experiment?
A. Only amino acids contain sulfur. B. Only nucleic acids contain sulfur. C. Both nucleic acids and amino acids contain sulfur. D. The radioactive sulfur labels peptide bonds.
What is bioprospecting?
A. An exploration of nature in the search for potentially useful organisms or their products. B. A search for unknown organisms that may become serious pathogens to humans. C. A search for unknown organisms that may become serious pathogens to farm animals. D. Use of microorganisms to locate and extract valuable minerals from deep underground.
GENETIC DRIFT IS THE RESULT OF _____
Fill in the blank(s) with the appropriate word(s).