Energy stored in which of the following substances
is converted by mitochondria to a form usable by the
cell?
a. water
b. organic compounds
c. NAD+
d. ATP
e. carbon dioxide
Answer: b
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Clonal selection is the idea that:
A. sequence information from the antigen is copied into the DNA of a B cell. B. genomic rearrangement responds to the presence of antigen to produce the correct antibody. C. the ability of an antibody to bind antigen results in mitotic cell division. D. Two answer options are correct: genomic rearrangement responds to the presence of antigen to produce the correct antibody AND the ability of an antibody to bind antigen results in mitotic cell division.
Answer the following statements true (T) or false (F)
1. Facilitated diffusion is required for the movement of Na+ out of the cell. 2. The Na+/K+-ATPase pump is a ligand-gated ion channel. 3. A macrophage (immune cell) consuming a bacteria is best described as phagocytosis. 4. Ion gradients across the membrane drive numerous cellular functions.
The ________ nervous system cannot be controlled by conscious thought.
A. autonomic B. central C. motor D. voluntary
Which of the following attributes is the most critical for increasing the chance of cospeciation of parasite and host?
a. The life history of parasite and host are tightly linked. b. The parasite and host are coevolving. c. The parasite adjusts its life cycle to its host's life cycle. d. The parasite is only transmitted vertically from parent to offspring.