Bacterial decomposition of organic nitrogen results in the production of:
a. ammonia.
b. nitrates.
c. nitrites.
d. atmospheric nitrogen.
e. urea.
D
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When solute is added to food products, the water activity (aw)
A) increases. B) decreases. C) remains the same. D) initially increases and then decreases.
Estrogen receptor (ER) ? typically ____, while ER? typically ____
a. stimulates DNA binding; inhibits DNA binding b. stimulates cell proliferation; inhibits cell proliferation c. stimulates channel opening; inhibits channel opening d. inhibits DNA binding; stimulates DNA binding e. inhibits cell proliferation; stimulates cell proliferation
Antibodies are proteins produced by the body. Antibiotics are prescription medications that can kill or inhibit the growth of microorganisms. How are antibodies different from antibiotics?
A) Unlike antibodies, antibiotics are useful against all pathogens. B) The body depends on antibodies, but not antibiotics, as its first line of defense. C) Unlike antibiotics, antibodies can help protect the body against viral pathogens. D) The body can make antibiotics, but not antibodies.
During which phase of mitosis does chromatin condense into chromosomes as the nuclear membrane breaks down?
metaphase interphase anaphase prophase telophase