What type of joint allows you to shake your head "no"?
A. ball and socket
B. hinge
C. pivot
D. saddle
E. none of the above
Answer: C. pivot
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Curare is a poison that was used by South American Indians on their arrowheads. Curare blocks the action of the neurotransmitter acetylcholine. How did the action of curare make hunting easier for these Indians?
A. Blocking acetylcholine shut down cellular respiration and killed organisms. B. The prey were paralyzed. C. The hunted animals bled to death. D. Curare interferes with the spontaneous depolarization of heart muscle cells.
The Earth’s shifts the angle of its axis
approximately every ___ years.
a. 4,000 b. 40,000 c. 400,000 d. 4,000,000 e. 4,000,000,000
The position of a specific gene on a chromosome can be determined by:
a. preparing a karyotype. b. southern blotting. c. genomic hybridization. d. chromosome sorting. e. fluorescent in situ hybridization.
Which of these is not true of the citric acid cycle?
a. The citric acid cycle includes the prep reaction. b. The citric acid cycle produces ATP by substrate-level ATP synthesis. c. The citric acid cycle occurs in the mitochondria. d. The citric acid cycle produces two ATP per glucose molecule.