Why is water involved in most metabolic reactions in the human body?
A. It can absorb and release heat without changing temperature very much.
B. It has a high surface tension.
C. It can dissolve many chemical compounds.
D. Its bonds are nonpolar.
E. It is a solute.
Answer: C
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The process of synthesizing a protein from mRNA instructions is called
A) replication. B) transcription. C) translation. D) ribolation. E) protein synthesis.
The function of ATP synthase is to
a. act enzymatically. b. build membranes. c. carry hydrogen. d. synthesize ATP. e. transport oxygen.
Breathing is controlled solely by the medulla oblongata and pons.
Answer the following statement true (T) or false (F)
Which is TRUE about hormonal control during pregnancy?
A. The corpus luteum must remain functional for 38 weeks, because it is the main source of estrogen and progesterone. B. The placenta responds to estrogen and progesterone from the corpus luteum, but does not secrete them. C. The placenta produces estrogen without any contribution from the fetal adrenal cortex. D. The placenta is provided with androgens by the maternal ovaries and adrenal glands, and by the fetal adrenal glands. E. The placenta secretes only steroid hormones, while fetal and maternal pituitary glands secrete pregnancy-specific protein hormones.