Which of the following are involved directly in myosin synthesis?
a. RNA
b. actin
c. DNA
d. microfilaments
e. All of the above
A
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In mitosis, which structure anchors the spindle fibers to the chromosome?
A. Centromere B. Kinetochore C. Chromatid D. Aster E. Mitotic spindle
If blood oxygen levels are reduced, cells in the kidney respond by secreting the hormone ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is an accurate description of hydrocarbons?
A. They are nonpolar molecules. B. Most of them contain phosphorus. C. Most of them contain sulfur. D. They are polar molecules.
Which of the following descriptions best fits the acid-base disorder respiratory alkalosis?
A) consequence of hyperventilation, for example in fever or mental illness B) consequence of prolonged vomiting C) consequence of reduced alveolar ventilation, for example due to COPD D) consequence of tissue hypoxia, for example in ischemic conditions