What is a triglyceride?
A) a lipid made of two glycerols, a fatty acid, and a phosphate group
B) a lipid made of one glycerol and three fatty acids
C) a polypeptide made of three amino acids
D) a carbohydrate made of three sugars
E) a lipid made of one glycerol and two fatty acids
Answer: B
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A. are derived from T lymphocytes. B. function in blood clotting. C. function in cell-mediated immunity. D. produce and secrete antibodies.
In the human cardiovascular system, what's the difference between the pulmonary circuit and the systemic circuit?
What will be an ideal response?
When a species lives in a constant environment for a long time, the "average type" of individual may have the best chance of surviving and producing the most offspring. What type of selection is occurring?
A) Directional B) Sexual C) Stabilizing D) Disruptive E) Artificial
A mixed solution of water and small molecules is exposed to a cell membrane and allowed to interact for an hour. Which molecule would be most likely to cross the phospholipid bilayer without the aid of transport proteins and diffuse across the membrane the fastest?
A. NH3 B. CH3COO- C. NH4+ D. Water E. Na+