Turgor pressure is observed when a plant cells environment is ________________.
A. hypoosmotic
B. isosmotic
C. osmosis
D. hyperosmotic
A. hypoosmotic
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Answer the question using the accompanying figure. At which point in this action potential diagram are Na+ inactivation
gates opening?
a. A b. B c. C d. D e. E
Which of the following statements is false?
a. The plasma membrane is more like a fluid than a solid. b. The cell membrane is symmetrical, so it is impossible to identify which is the extracellular surface. c. Calcium pumps move calcium ions across the membrane. d. In a plasma membrane, proteins shift positions and phospholipids flex their tails. e. There are functional differences between the two sides of the plasma membranes.
Which ovarian hormone is at its highest concentration after ovulation?
a. GnRH b. estrogen c. progesterone d. FSH e. LH
Approximately what percentage of the human genome encodes proteins?
a. 1 b. 3 c. 5 d. 15 e. 50