How many distinct aminoacyl-tRNA synthetases does each cell make?
A. ~180
B. ~60
C. ~20
D. ~1
E. ~120
Answer: C
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The pituitary gland secretes ______ during the alarm reaction.
a) corticosteroids b) neurotransmitters c) CRH d) ACTH
Which of the following is true of water?
a. The oxygen end is slightly electropositive. b. Hydrogen bonds hold water molecules together. c. Water covers about one-half of the earth’s surface. d. It participates in hydrophobic interactions with polar molecules. e. Its solvent properties are greatest with nonpolar molecules.
The ________, or thrombocytes, play a vital role in clotting
Fill in the blank(s) with correct word
To determine the effects of caffeine on memory formation, Professor Mulligan gives one group of students a cup of caffeinated coffee and a separate group of students a cup of decaffeinated coffee. Thirty minutes later, he administers a memory formation task to both groups. The coffee in this experiment (both caffeinated and decaffeinated) represents the ________ .
a. control group b. independent variable c. experimental group d. dependent variable e. confounding variable