Class I major histocompatibility complex molecules are found on ________ cells.
A. all anucleated
B. all nucleated
C. antigen-presenting
D. None of the choices are correct.
Answer: B
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Answer the following statements true (T) or false (F)
1. All tissues are composed of cells. 2. The capacity to maintain a fairly constant body temperature is a homeostatic process. 3. A community is composed of different populations of animals and plants. 4. A defining characteristic that distinguishes prokaryotic and eukaryotic organisms is the lack of cell structure in one versus the other.
Fumarate production is an oxidation reaction similar to the reactions that produce ?-ketoglutarate, and oxaloacetate, but with one key difference. What is it?
a. Fumarate production releases a water molecule. b. Carbon dioxide is released in this reaction. c. This reaction reduces FAD instead of NAD+. d. Fumarate production occurs twice per cycle.
A neuron's membrane that maintains a charge difference across its surface in which the inside is more negative than the outside is called ________
A) graded potential B) resting potential C) action potential D) summation
What is calmodulin, and what role does it play in signal transduction? What will be an ideal response?