Which of the following best shows how primary structure relates to protein function?
a. high temperatures cause proteins to denature.
b. changing one amino acid in the protein hemoglobin causes sickle-cell anemia.
c. proteins are sensitive to changes in ph.
d. the shape and chemistry of an enzyme's active site determine its function.

Which statement about the immune system is false? a. lymphocytes reduce inflammation, b. b cells remember specific pathogens. c. most white blood cells kill bacteria d. white blood cells are made in lymph nodes.

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

Is becoming less expensive to screen blood samples for dna certain diseases have genetic basis what is possible ethical concern about the availability of inexpensive dna testing