Atoms containing a specific number of protons are called:
A. molecules
B. minerals
C. metals
D. elements
D
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Which of the following is true of the allergic response?
A) Sufferers produce the IgE class of gamma globulins in response to allergens. B) Upon the very first exposure to an allergen, an allergy sufferer will probably experience a runny nose, watery eyes, and mild wheezing. C) It is a normal, healthy, adaptive response to an allergen. D) Allergies are most common in people also responding to infections of intestinal worms.
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.
How does the FoodExpert-ID identify macroorganisms and why is this significant?
What will be an ideal response?
Which disease is transmitted via ingestion of contaminated water and can cause paralysis?
a) Rabies b) Japanese encephalitis c) West Nile encephalitis d) Polio