A secondary immune response produces antibodies in _______ days.
A. 1-2
B. 3-5
C. 6-9
D. 10-1
Answer: B. 3-5
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You have discovered a new coccoid-shaped microorganism with no nucleus, a rigid cell wall, and a diameter of 2 µm. Chemical tests reveal that its cell wall does NOT contain peptidoglycan. The new microorganism is
A) most likely a bacterium. B) most likely a eukaryote. C) most likely an archaeon. D) either a bacterium or an archaeon.
Which is responsible for encoding the proteins found in a cell?
A. genome B. proteome C. cytoskeleton D. evolution E. extracellular proteins
What would need to change to allow sodium and potassium ions to easily diffuse through plasma membranes?
A. They would have to shrink in size. B. The low solubility that they have in lipids would have to increase. C. The high solubility that they have in lipids would have to decrease. D. The high solubility that they have in water would have to decrease. E. The low solubility that they have in lipids would have to increase, and the high solubility that they have in water would have to decrease.
A portion of a DNA molecule wound around a spool of
histone protein is called a a. centromere. b. nucleosome. c. spindle. d. furrow. e. cell cycle.